I also remember him saying the best way over a lifting "plateau" was to get piss-drunk and then hit the gym for an orgy of pain-free lifting (well, until next day)...
Barring the fact that Arnold is a genetic freak and specimen that's not found on a daily basis, I have my doubts that someone with normally-proportioned arms in terms of length can work out with 40% of their body-weight in terms of curls.
I've seen some wild stuff in gyms, so I'm not totally discounting things, mind you.
