Other people's faces.

I always smoke with my friends, and sometimes we'll just be sitting at a table at Mellow Mushroom and waiting, and one of them will make the dumbest fucking face ever, and we'll all just start laughing uncontrollably.

It's ridiculous.

One time I smoked with one of my best friends and we went to my house and watched TV. My friend goes "There's black people on TV?" and I don't think I've ever laughed so hard in my life.