Apparently this is something they do in modesto.
Here's how it works:
You take a block of ice and some soap..
Find a hill with grass that isn't too long..
Spread soap on the hill and on side of the ice..
Put a towel on the other,
and away you slide!!
This involved a lot of falling over.
(ps.. my mom took almost all of these pictures)
Much Love,
TessieB