Really? Heavy? Tommy rolls his eyes at that. But he has a rule. In situations where it isn't life or death, or absolutely funny, he doesn't break people's requests about that stuff. It can be uncomfortable for them.

"Dude, I can lift a literal ton. Okay, I can only lift 850, but seriously, if you're that dense, that's pretty impressive."

So he starts moving, walking away from Cap like he isn't even bothered by how slow he has to go for a normal person.