The look he got almost had him just walking away, but luckily he stuck around to get some kind of an explanation. He didn't look happy with it. He understood, but he wasn't happy and was even more worried that Tony was going to work himself into another heart attack.

"Alright... I get it. Just take it slow. Have you eaten? Drank anything? I'll go make you something." Because no, collapsing once was one too many times for Gladio's liking. He wasn't going to have it happen again. But he wasn't going to stop Tony either. He understood that you couldn't really escape that need. He could only hope it wore off soon.