I usually act like I'm plastered if I'm on the lift with a buddy. There might be a decent chance that I am buzzed. If I'm with a friend we really play it up. One time this girl got all upset yelling at us that it's no fun to ski with drunk people. Never mind the fact that she wouldn't have ever known if we hadn't made a joke.
One time this dude kept saying there was going to be a blowback on the lift I was on (it kept pausing and bouncing up and down this was in Winter Park), and it freaked me the fuck out. I can't tell if he was trolling me or being honest. Either way, if you want to fuck with newbies it would probably be a good idea.