What did I do last night?

The last thing I remember was being at Reversible Eye (1103 N. California) gallery at around midnight. My next memory was me standing in front of Rush Medical Center at 7am. I had all my stuff, but I was wearing my back pack upside down and my wrists were covered in dry blood. And my lip hurt. I just got home and found dried blood all over my shirt. And a bash on my leg. Did I piss someone off last night? I have a 7 hour memory gap. This is the weirdest one yet.