>in pure math/physics class
>that one kid that tries to impress the professor by bringing up advanced grad level material he doesn't understand that he read on wikipedia or saw in a popsci vid
>always does horribly in the class, either fails or gets a C

Happened many times now. On the first day of E&M one guy brought up gauge symmetry and would always ask questions about grad level physics. He failed the class. Happened in algebra too with someone bringing up category theory and universal constructions when we were covering the group isomorphism theorems.

Don't be that guy.