It's fairly common for people over here to say something like, 'I'm lost, can you point me in the right direction'. Not many men ever do, but it happens once in a while.
I think pointing to show someone where something is in order to help them out is one thing. Pointing and laughing at someone who's just fallen over is another. That's what I'd call rude.
eta: I do love shows like funniest home videos with all those people falling over and stuff, but they're putting it out there, so obviously they must think it's funny too. I do also laugh sometimes when the kids stack it or even other people, but I never point.
That would be rude. lol