Originally Posted by bombusben
1) lean forward
2) when crank arms are horizontal, push down with back foot, pull up with front foot
3) bask in the glory of your skid
...you might want to add: 0) stand up. At least at first. Better leverage. After the first few rocky times you'll get this kinesthetic memory from first or second grade when you used to skid around the neighborhood on whatever bike was cool back then.