Things to Do with "open"
1) Ring someones doorbell and when they open it pretend they're the one who rang the doorbell.
2) Cut open glow sticks and dump them into bubble solution to make glow in the dark bubbles.
3) Go to a friends house. When they open the door act like a super agent and investigate them.
6) Shake a soda and give it to your friend when they open it the soda will explode.
7) Get in a elevator. when the doors open to let someone on, push the close door button.
10) Cut open a big cardboard box so it's flat, go outside and put it near the sidewalk, do sick dance moves on it while beat boxing your own music.