I have hit em off like that loads of times. We bent the shaft of a hammer cause of the force we were hittin em with. Beware though if you do it this way, they dont half f**kin come of with some speed (almost smashed trialsboy560's kitchen window haha)
Was watching it now but got bored, wasnt as good as when they brought out the massive table saw an chopped that person up into slices. Watched it when it was on last year to, that old woma on it tonight ummm