Picture of Macgyver Timed Door Opener
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Step 1: What you need

the first thing you will need is your trusty Swiss Army Knife. next you will need - a good length of para cord - a weight ( bucket, brick etc... ) - some matches - your trusty role of duct tape - apiece of wire - a little bit of time and your ever so important Macgyver themed music playing in the back ground

Step 2: Find A Weight

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Find a brick, or a bucket and tie a long piece of string to it.

Step 3: Find Your Door

Picture of Find Your Door
Locate the door you want to open

Step 4: Find A Hook

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Find a place on the ceiling that you can run a loop of string

Step 5: Tie A Knot

Picture of Tie A Knot
Tie a loop not in the middle of the string that's on the weight

Step 6: Wrap The Knob

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Take the end of your first cord and wrap it around the doorknob 5 times and put the brick threw the loop on the ceiling

Step 7: Screw Loose

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Find a loose screw in a wall or table, pull the screw out a little and wrap the end of some string around it then use your Swiss Army knife to put the screw back in

Step 8: Tie It Up

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Take that string you just wrapped, and tie it very tight to the loop tied to the brick

Step 9: Fuse

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Take your wire and bend it in the shape of an Double L. Then bend the end and tie your fuse( string ) to it. Finally tape a few matches to the end of the wire

Step 10: Placing The Fuse

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Tape the fuse assembally under the string tied to the loop

Step 11: Set Up

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Open the door just enough so that the bolt clears the hole

Step 12: Light The Fuse

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Light the bottom of the fuse and wait