Gladio really wanted to throw his tea at him. Take a leaf out of his book and throw a thing when he was annoyed. But the drink was hot and he didn't actually want to hurt Tony...

"Maybe I could've found it as fun as you, if you hadn't just grabbed me up. Maybe if you hadn't spun..." Oh yeah, the anger was thick in his voice there and he had to pull himself back to take a deep breath. Gladio sipped at his tea in a bid to calm himself down.

Alright. Maybe he believed that Tony wouldn't do anything to deliberately hurt him. But he still didn't like being used like that. "I'm not a toy, Tony. I'm not a tool. I'm not something you can use to impress... You could've done anything else to impress Noct. Not ignore me when I told you to let me go."