If you saw someone slip on a banana peel, would you laugh?

How come this doesn't happen as often as it should

It depends.

I'd laugh at first. Then depending on the person, I'd go and see if their ok.

I would hope that I had quick enough reflexes to make the proper whistle noise to accompany the slip and fall incident. If not, then I would at least like to have a clown horn handy to honk for the hell of it afterwards.

depends on the person.

I'd go & help the person up

I'd laugh, slip away, then forget about it.

Even thinking about it made me laugh a little.

If that wasn't such a well known slap stick comedic bit, then it wouldn't be funny, I don't find people slipping funny.
But since it is so well known as something you see in movies/shows but something that you think wouldn't actually happen in real life, I would laugh my ass off if I saw a person actually slip on a banana peel.

I would start laughing, check to see if they were still alive, and if they were I would keep laughing.

laugh? I'd be in hysterics

I'd probably have thrown the peel as a joke ;)