I took 24 credit hours one semester, 20 of which was upper level physics and math…I had to sign a form promising I wouldn’t try to graduate early by taking on two full time course loads (I was tackling two degrees). Were it not for the two jobs and girlfriend (now wife), it wouldn’t have been so bad…but I got all A’s in the real classes and a B in the world’s dumbest linguistics class (my other two linguistics courses were actually really good).