How to Rig an Easy Booby Trap




I sometimes have problems with people in my family (mainly my sister) coming into my room uninvited and stealing things like movies and such. So I rigged up a simple but very effective booby trap based on a trap called the Tiger Trap (a type of dead fall) that was used by the Viet Cong in the Vietnam War. This booby trap is designed for doorways but can be adapted to just about anything. Please do not leave any rude comments, criticism is okay and questions are accepted and replied to as soon as I can.

Step 1: Materials

1) Fishing Wire
2) One Plastic Tube or Container
3) One Empty Scotch Tape Spool
4) Copy Paper

Step 2: Tools

1) One Knife or Scissors
2) Clear Duct Tape

Step 3: Assembly

First, cut out two one by one inch squares from the copy paper. Roll them both into cylinders and tape them. Tape one of the cylinder horizontally to the right hand lower side of the doorway about where you want the trip wire to go. Tape the other cylinder at the top right hand corner of the doorway vertically but angled slightly to the left (like the picture). Next, tape the scotch tape roll to the ceiling about three inches away from the wall (again look at the picture).

Step 4: Assembly (Continued)

Cut a six inch section of fishing wire and tape one end to the base of the plastic container (try to find a container like mine, it works best). Tape the other end to the ceiling about four inches away from the scotch tape spool. Tape the end of your spool of fishing wire opposite your horizontal cylinder and measure out how much wire you need to pass through all the pieces and get to your container. Cut the wire and string it through your pieces and tape it to the plastic container. Pull the slack out of your wire to where the container is about tong the tape spool.

Note: I know this is hard to follow but bear with me and consult the pictures and diagram.

Step 5: Diagram

Here is a diagram for you to consult if you don't completely understand the directions.



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    26 Discussions


    1 year ago

    I made my own once by tying one end of a piece of thread to my doorknob and the other end to the handle of a a mug (or anything breakable); I then put the mug on a shelf or any other high place. If someone (my brother and his friends) continued to go into my room uninvited, the mug would shatter and I would know. This worked for me because I had two doors in my room (weird, I know, I was in the basement) and could go out without triggering the trap. You could really connect anything to that doorknob. Just be creative, and not do anything do dangerous in the heat of the anger. I once was gonna lay strips of tacks in front of the door but I was worried my dog would eat them.


    2 years ago

    How do you set it and then get out of the room?


    4 years ago on Introduction

    i made my own for my sister.but my mom came in :P and i cane in without disarming it noob :/ anyway mine is diferent i taped that sirene thing on floore next to doore so when door is opened it goes off (to scare victim and inform me about its presence) i also puted double string on door handle and through chair hole to make so it pulls string when doore is opened and taped thoesstrings to razor i also taped thin rope thing on celing snd on it water baloon then i taped comon string to water baloon and pulled it so that if string was cuted baloon would fly throwards door but so that even if doore was opened just a bit.then i taped it on my tabel so that it gone throug razor wit 2 what hapened when my mom caome in (even tho i said to her not to) opening doore puled 2 strings and razor atached to thoes strings cuted third string at that time sirene went off and then baloon flyed on my mums head i know that it was wrong to pull this on my mum it was for my sieter and im now grounded.but she said that it was nice construction. if this gets many askings or likes or whatever ill make toutorial for this

    1 reply

    3 years ago on Introduction


    Love it! It's very easy to make with few materials. Thanks for the great instructable!

    Keep up the good work!


    4 years ago on Step 5


    this is a good one! :)


    6 years ago on Introduction

    awsome it works so could also put fun snaps in it so the people get a little fright,insted of using paper you could also use the bendy parts of the straws that way it will not chafe against the paper or rope. awsome moddel works so well :-):-):-)


    7 years ago on Introduction

    empty toilet paper rolls work well too. so does the tubing from a hanger.

    nice tiger trap....simple and effective.


    7 years ago on Introduction

    I found that if you want a more permanent trap that can take weight instead of little paper tubes, for the bottom cylinder replace it with a staple that is partially inserted into the wall, remove the opposite end of the staple where the wire is resting on, bend it almost perpendicular to the wall and fold it in. And for the top one, insert a staple 2/3rds of the way into the wall. You can also staple the beginning of the trap, (The tripwire itself) to the wall as well, the triggering mechanism is the wire setting off the first bent staple, allowing the object to fall onto the target and for the trap to be reset too rather easiely instead of retaping and stuff.

    The only problem is that it will not hit everyone, it depends on the length of fishing wire. If you are attempting to hit taller people, use less wire, or shorter people, use more.

    1 reply

    Reply 7 years ago on Introduction

    If you tape the spol out far enough, the extra tape a couple inches ahead of the spool is not neccessary, it's only another thing to go wrong as well.

    The trip wire is rigged through the pulleys to hold the container up. When the trip wire is released then the weight of what ever is in the container swings it down and drops the stuff in the container.


    9 years ago on Introduction

    clever can't wait to try it
    but it would be nice to suggest some possible substitutions for the cylinder

    1 reply

    9 years ago on Step 5

    I have actually tried this before. Gave up halfway considering I was still a little kid then. What do you actually put inside the container? Can it hold up water?

    1 reply

    Reply 9 years ago on Introduction

    How could you be "a little kid then" if this has only been up for a month. Anyway, I put water in it when I set it and it worked perfect. Happy Hunting! :-)