Originally Posted by Whiskey Tango
He pulls his punches because Supes is a good guy and doesn't kill people, especially other good guys duh
On the other hand Stark can withstand blows from Mjolnir, the armor's not exactly made out of tissue paper.
It's a great gif tho.
I think what Excelsior was trying to say is that Supes isn't pulling his punches in that particular scene
. We all know he holds back when necessary.