You stand on your skis, one prong of the T-bar hooks behind your bum and pulls you forward (the rope and T don’t point up, they point diagonally forward). Ideally you have someone on the other side to balance it out–unless you are a snowboarder, then you have to go solo with it hooked between your legs and you’re always being pulled diagonally and if you lose it, you’ve got to trudge down to the bottom and start again. Given Lottie’s lack of skill, I suspect she’s stuck on chair lift runs only.