water balloon

ever wondered how in movies they make a trap so that when u step on the string something falls, well now you can. First take thin string like kite string. tie a ballon on it. Hang the ballon over the place whre you want it to fall. Hook the string tight on something and then run down stairs. the string from upstairs should be on the floor so when u get outside you just have to pick it up and rap it around a nail or something in the wall(make sur its close to the ground). from the nail take the string and walk into the grass( this whole time you should make sure the string tight). Break a pencil an the part where you broke it stick it in the grass. By now you should have tighed a little loop on the string. With the loop hook it on the pencil. Run upstairs and unhook the string from the secure place you had it. Slowly put the water ballons over the balcony. Hint:the string has to be really tight so that it will triger better.