When Hulk snapped his fingers in Stark’s nano gauntlet ... because this is the Avengers’ snap, Hulk probably made sure that people would not reappear in mid-air or any other dangerous places ...

He did it with a simple snap, a physical action — even though the power granted to him by a fully powered Infinity Gauntlet meant he could accomplish the same feat with nothing more than a thought.

Possibly the biggest mistake Thanos made the ENTIRE movie! He put all his power into a single snap but that metal gauntlet COULDN'T SNAP! That's right, Marvel made a big no no and I am here to set ...