Back during Justin's first attempt to talk down this "burning" fellow, I'm sure at least a few people wondered why panel four of this comic
seemed to focus on the top of, and above, the fire guy's head. Justin's comment in panel two of this comic is why; it was indicative of Justin noticing the lack of smoke.
The lack of burning heat was hinted at in the comics after that as well. Heck, if this guy was really fire-hot, Justin's hair would be singed just from the close dodging. I wonder if anyone nitpicked that... *insert maniacal laughter here*
I didn't draw him with this intention, but the professor in panel three sort of looks like he's dressed as the Eleventh Doctor
from Doctor Who
. Or maybe the Eleventh Doctor is dressed like a professor. In any case, I find it amusing, but it wasn't something I planned.
The appearance of the college student in that panel, meanwhile, was inspired by me wanting to draw a cute woman with pigtails in a zip-up hooded sweatshirt. So... yeah. Her appearance was entirely planned....though if that professor actually IS an incarnation of The Doctor, then maybe she's a companion?
Then again, if defying the laws of physics made Doctor Who cry, he'd never get anything done.