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Step 1: Tools
Step 2: The Trap
Tape the sting to a nearby wall. Then tie the other end to the door knob but before you tie it put the bucket handle on the string. Place the bucket on the edge of a surface put all the marbles in the bucket
Step 3: The Effect
When someone opens the door the bucket will fall on the zip-line and hit the person in the legs it also make a lot of noise