I think the last bubble means more like "what happened?" or "what is it?", but your suggestion was just too good to be left out.
I am in trouble now cause I woke everyone up
Mo... Mogami...?Crap, gotta hide this or else...Guess I'll take one...Is anybody there?Man, I'm starving...H- Heya, how's it hanging?Oh? The ehoumaki for tomorrow!!