With the dust clouds, it kinda makes me thing that Sonic was running around really fast (y'know, being generally annoying) and Krystal just shoved the gun right up to his face, where he stopped at the last second.
Krystal: "If you don't stop that right now I'm gonna make you stop." Sonic: "Hey, hey, take it easy, girl. I'll stop, I'll stop! Just stop pointin' that thing at me."