Not-so-funny one, but I think it's worth to read
1. During the trailers, shout, Fast forward! Fast forward!
2. Wear a very tall hat.
3. When people come in late, say Orrrrrhhhh very loudly.
4. During opening credits... point at a character and say loudly, "He dies at the end."
5. After every gunshot, scream "take cover!" and hit the floor.
6. Use a laser pointer and point the beam at the screen, especially at characters private parts.
7. Go tsk tsk tsk tsk tsk loudly at every kissing scene.
8. Throw popcorn in the air and yell, "It's snowing! Its snowing!"
9. Clap and cheer whenever one of the good guys gets killed.
10. Urge everyone in the cinema to start a Mexican wave.
11. During love scenes, say loudly in Mandarin, Ngggh! Bu yao, ma! (Dont!)
12. During horror movies, keep singing the theme to Jaws (dum dum dum dum dum dum dum dum dum dum)
13. Sit on old people, pretending not to know they are there
14. Go to an afternoon screening. Go out of your way to sit next to the only other person in the cinema. Smile at him/her suggestively. (Recommended: waggle your eyebrows for added effect.)
15. Repeat all dialogue ten seconds after it's said on screen.
16. Bring in durians for your movie snack.
17. Or bring in a bowl of noodle soup, and slurp it up loudly.
18. During a sensitive scene, stand up and say loudly, I go shee-shee now, can?
19. Eat the snacks of the person sitting next to you.
20. Lick the person sitting next to you.
Similar thread/link:
50 Fun Things to Do at Computer Lab 
50 Fun Things to Do at K-Mart (Or Wal-Mart)
Things You Learn from Watching Porn (18+ only)
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Good one... 
