I think G's upon the Human body limit how much full scale can do... as in walls, and blenders and such.
But i have seen a YAK harrier to an extent, and Matt Chapman does some Sick ass stuff.
There was one guy I saw do a wall on one of those stupid "believe it or not shows" but he pulled like 11 G's , and passed out for like 10 sec.... so he holds some kind of record now, and it was deemed too dangerous!
I'm not an authority, and i'm sure some cats know alot more... but this is the little I know!