Dean, Sam and John were fighting. John was yelling at Sam about how he left him and Dean than John starts yelling at Dean about how he didn't listen to him.

After a while Sam leaves but John keeps yelling at Dean and whenever you tried to intervene Dean gave you a pleading look not to even though he doesn't like you a lot.

John finally leaves and Dean is pissed and sad. He goes to the bathroom to cool off, after two minutes you hear glass break.