okay i've got a good one.
this would probably work best if you are really close to the friend you decide to do this with. Knowing them for a long time is desirable.
So first you have to make sure your friend is skiing with their whole family. This is very important. So after skiing for a little while, perhaps halfway through the day, suggest a run through the trees. Tell them you know a great area that isn't too steep and is not known at all, so that everyone comes with you. This step requires previous preparation, not too hard though. just dig a hole, about ten feet deep and ten feet wide. It doesn't need to be covered, just fairly hidden. Next gather some tools, like battery powered buzzsaws, battery powered drills, hacksaws, hedge trimmers, that sort of thing. Hide them near the hole. Once you take your friend and their family to the area, push all of them in the hole. This will probably require getting out of your skis so that they don't fight back. Push the dad in first, or whoever you deem strongest. Once they're in, tell them you are going to go get help. In reality, you are just out of sight of them, preparing your tools. You will then help the strongest one out, as long as that person is not the friend you want to prank. Surprise this person with one of the tools, a nice drill bit to the skull always does the trick. Use one of the saws to seperate limbs from the body and put them back in the hole. Continue this process until only your friend is left. Look into his eyes, remember all of the memories you two had, and would have had, and then slowly lick the blood of his family off your hands.
