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