I actually didn't fall. The truss swung out about thirty feet over the big chasm, and I hung on to the end of it, dangling down holding on with my fingers. Luckily it swung right back to the wall I had been walking on. It was as big a thrill as bungee jumping I'm sure, I didn't even have to pay money for the adrenaline rush!
Ahnold would have been proud. No stunt double.