Rocket

"Oh, yeah." As always, the explosion was like a little burst of happiness, even though it wasn't destroying anything except itself. "It's primitive an' not so powerful. Not the best shit I can put out, but I don't got materials here. You want closer to my best work, ask Stark to show you a watch I made'im. Got some solid sonic blast outta it." Talking about fun stuff helped chase out the bad stuff for a bit, too, as evidenced by Rocket's ears relaxing and pricking forward again.