USUALLY I do not laugh (I say usually because I did laugh one time when my friend fell like a cartoon character

). But yeah I don't normally find tripping funny. I legit pretend like I don't see it because I know if I were in that situation I'd feel better if people either
a) didn't notice
or
b) pretended not to notice
because I would feel better about just escaping. So I do the same to others unless it was a particularly bad fall, then I'd say something and help them up