What would you do if you blacked out while your friend got jumped ?

And you were supposedly right there in the same room where it happened, they said you did absoutely nothing to help him/her during the fight, and yet you have NO recollection of ANY fight happeneing at alll because you had way too much to drink that night? Now you look like a pansy and a bad friend because they don't believe you when you say U have no idea it happened?