Throw ice balls. Not at people, I'm not an ass. I throw them onto the opposing chairs coming back down. If it stays you get a point.
If I'm with a group of my friends, act normal as you are 1 or 2 chairs away from getting your chair, then proceed to "Sprint-hop" past everybody to ride up with the most creepy, old ski patrol guys (or ski moms) you can find and talk about controversial topics.