Sheldon's search for the answer to a physics problem (Why electrons behave as if they have no mass when traveling through a graphene sheet) keeps him awake for several days and he becomes obsessed with trying to solve it acting crazier than normal.
Sheldon's search for the answer to a physics problem (Why electrons behave as if they have no mass when traveling through a graphene sheet) keeps him awake for several days and he becomes obsessed with trying to solve it acting crazier than normal.