In reply to Crimpchimp:
Thick pants / gaffa tape.
Have heard tale of folk climbing routes at the Etive Slabs in leathers
Personally never felt in the position to turn and run when a slab has gone wrong. They tend to be very thin and a fall would normally come from a foot loosing position, which leaves no time to correct.
Gear is often also thin, or distant, so pushing off would seem to be increasing the risk of the placement failing. You are probably going to hit and slide again before you reach your gear anyway.
You could sacrifice the rubber on your shoes, slide backwards whilst frantically paddling with your hands. Can control the speed of some smaller falls, but beware of ledges flipping you upside down!
But best of all, dont fall off! Took a 10m or so slide off Serenity Crack on my second day in Yosemite and had to suffer the cracking scabs all the way up the right side of my body for the rest of the trip!