You might find some crazy stuff looking up Havyk. They’re from the MMA industry, so a lot of their videos are much stronger and tougher than I do with my clients, but they handle them well.
This was their booth at IDEA 2012 (where I got mine). This guy was AMAZINGLY STRONG. It’s a whole new ball game putting them under both hands and feet!!!
Another one with crazy-advanced exercises
And more do-able