I've definitely never actually done this on a sledding hill, but I've absolutely tried sliding across a slicked over sidewalk and found parts of it rather a lot less icy than I thought. It usually results in a certain style of acrobatics you hope nobody else sees. This coming winter, make sure to wear your sledding helmets, knee pads, and double gloves... just long enough to get out of view of your parents, then toss it and have fun!