I'm going to ask a guy on a ski lift to stop smoking and wait until he's off the lift
What made you ask him to wait?
Because I'm gonna slap him if he doesn't
I do not think that you can do that. You are out in the open, so I do not think that there are any laws that state he cannot smoke on the lift. You can't demand things like that of strangers
He only has to wait 3 seconds. I should be able to ask him that without any repurcussions.
I think that is a reasonable request. He doesn't have to wait long to smoke so you should just ask politely. No need to threaten violence.