The kids at the big event barn where I board my mare in the winter, do this when there's enough snow on the ground. They tack up their horses / ponies, get sleds / snowboards etc, and pull each other all around the property at full gallop.
Makes a terrible racket and is great to desensitize your basic Ottb mare.
As long as you can stay ON said Ottb mare when the racket is going on, that is.
Yup, great fun.