MMMMMPPPHHHH.
MMMMMPPPPPHHHHH.
Since concrete beats bone, after that crazy girl causelessly uppercutted him with a tray, Tare turned his head into metal. Good thing too, because otherwise he might have a fractured skull, and 'lunchroom brawl' didn't seem like a good way to get introduced to the school nurse. Of course, the spikes were making him not just fall down, but again, considering the alternative was a fractured skull, this was a good thing.
Turning his arms back to people arms, he started pushing up, trying to pull his head out. Of course, since everyone else had left the lunchroom, poor Tare was stuck trying to do this alone.
Eventually freeing himself, and turning himself all the way back human, he falls down, dusts himself off, sees the lunchroom completely deserted, and making a mental note never to have anything to do with that wolfgirl ever again if he can help it, heads off to go clean himself up.