Knex Mine

Somebody on this site made a mine like this but i modded it so now when someone opens the door they get a shower of spacers.PRSAC (please rate, subscribe, and comment)

This is the base.

You have to have a spring motor to build this.

This is where you add the motor and shrapnel.

Make sure that the orange rod is in so that it will not fall out.

So here's the gist of it: Victim opens door, rod falls out and things go boom. I also recommend setting it up on a high dresser or something and balancing other knex grenades on it so that when the mine is activated, they fall to the floor and blow up.