Wow, De Niro got lean, did he really do all the physical stunts himself?
Especially the one arm pushup (not an easy feat for anyone, least alone someone in his 70's) and holding up Efron with one arm in the air?
I've seen young fit guys rip their pecs or hurt their shoulders when doing them incorrectly, and I am most careful when doing them myself (gotta know just how to position yourself to spread the stress evenly).
It totally looked like him, and unless there were hidden wires at least the one arm pushup looked totally real.
He sure looked way better here than in the Grudge Match movie where he clearly didn't bother to get in shape for.
Maybe he's going back to method acting like in his glory days?