By Daniel Chavkin Cosmo put on a mini show during the Cougars’ last game. BYU has produced some good players in recent years, but their best athlete may not be on the roster. Instead, it could be the mascot. Cosmo the Cougar, BYU’s mascot, showed off some impressive arm strength in a new social media video. The mascot successfully climbed two columns of folding tables stacked on each other by jumping up on all fours like an actual cat. When he got to the top, Cosmo then backflipped and summersaulted off the table and onto a gymnast’s mat to get back down. The impressive feat was something that…