Simple Pen Gun

this is a small, yet powerful pen gun that i made when i was bored.do not under any circumstances, shoot this at any living creature. by the way, this is my first instructable and feel free to comment on it.

you will need :

a ballpoint pen
2 rubber bands
scissors

unscrew the top and bottom of the pen and take the ink cartridge out of the bottom part that you unscrewed

cut one of the rubber bands in half and tie it to the bottom of the pen with the other rubber band

put the ink cartridge through the top of the pen

pull the cut rubber band back with the ink cartridge and let go. have fun with my instructable!