Nothing is worse than someone trying to correct grammar only to be proven wrong. There’s an awkwardness that just sort of hangs in the air for a while. It’s usually a good idea to avoid such situations by simply not being a pretentious jerk. Actually, that’s decent advice for all of life.
BEARD: No, they don't. No one is literally blowing your mind!
HARRY: Actually, I have a very thin skull and can feel a brisk breeze through my scalp. Sometimes students turn on all the hand dryers in the bathroom and I run my head beneath them.
BEARD: Why would you even do that? Just to prove me wrong?
HOBO: I believe he just blew your mind.