system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why does Iron Man fall back through the wormhole after he guides the nuke through it? Shouldn’t he just float off?
gpt
Earths gravity probably still applies to him even through a wormhole. It might not be as strong as if he was in earths atmosphere, but it applies some force. 

You could also kind of say that the wormhole might be applying gravity to iron man as well pulling it closer to it.