Fun Things to do in a movie theatre....

[Pieh]

I've always been fond of starting up a cheer when someone is getting the beat down. Just as soon as someone starts to get hit cheer and clap, sometimes you can get the whole theatre in on it.

You could also fill up a straw with soda, put a finger over one end to hold it in, then put a drop on the neck of the person in front of you, repeat until the straw is empty then fill it up and do it again.

Tie someones shoelaces together.  

Find a loud, expendable, noise making toy with wheels. turn it on and send it down the aisle.

Play with a bouncy-ball, hurl it at a wall. Bring a few.

Bring fake swords or those toy lightsabers and have a duel with a friend in front of the screen, works great during boring movies.

[Alia Clerya G. Sukory]

This always works if your a girl...
Buy a Soda (canned, cupped or anything) and when your on your seat make sure there is a stranger next to you... and when that stranger is already having fun watching the movie pretend that you accidently spilled the whole cup of soda on his pants, I asure you that stranger will be very mad![That's why you need to be a girl]

[CaptainPenguin]

That... Wouldn't work... Because you can't "pretend" that you spilled a soda on someone, unless you have a cup of water or something. It's a liquid, see? When you were like "Oops, I spilled my drink on your lap!" and giggled like a little girl, they would look down, not feel wet at all, and say "Uh... No, you didn't."

[Rei]

[Thats why you need to be a girl]
Maybe thats what she meant captain?

[Rei]

2. Laugh loudly during serious and sad scenes.

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I do that.  Honestly, I can't help it; they can be very funny!

I have done this once to but the bad thing is someone chopped me at the head and said "Be quiet you d**n #$&%$#!!"
Well, It's true they can be funny but I suggest that you really shouldn't laugh...

[Kinslayer]

A fun but simple little bit of crowd control is to applaud at the end of the film.  It's pointless, as no one involved in the project will ever hear your applause (unless you are at an indie festival or the like).  However, once one or two people start clapping their hands nearly everyone will automatically join in...