He can tell he did something wrong here, but he's not sure how to articulate what that is. Or how to fix it, or how to bring Iron Man back. People are confusing, and Tin Man more than most. He hesitates briefly, and then follows after him.

"The Hulk is the strongest there is," he points out. Duh. "Flag Man's puny too. Don't need him."

What is he trying to say? Why does it bother him that Iron Man's leaving? Doesn't he like being alone? Isn't that always the goal? He frowns deeply, and then pokes Iron Man again. It's the closest he can get to figuring out affection just yet.

"Don't... go."