Avengers: Endgame - 20 Things We Learned From The Director's Commentary

5. Iron Man's Armour Protected Him (Temporarily) From The Infinity Stones

Another major question fans had upon first viewing was the ability of Tony Stark to withstand holding the Infinity Stones in his Stark Gauntlet without being immediately disintegrated.

Joe Russo explains that his Iron Man armour is keeping him alive, while McFeely adds that, "as the power's coursing through him, he doesn't have a lot of time", and Russo finally concludes, "but when he snaps his fingers, it's too much."

So, there you have it - another "plot hole" sewn up.