I just assume he suddenly realizes that wasn't a fart.
I do wonder if he'll be able to hold the blaster in a more 'two handed' pose, seeing as his hands appear to be different from the Hot Spot base mold. Also not sure where all that extra hose goes or how the backpack transforms. I'm definitely not regretting skipping a few figures to get a Botcon clear blue Mirage, though. It'll pair perfectly and be a nice contrast to everyone else's Starscream pictures coming up (I admit I did get the Prize Inside Screamer ghost).