Lost: Friday nights memory

[..::ERIC::..]

Ok, so after leaving the pub with my mates my last memory is about 200m from my house in the company of a chick and 3 of my best mates. And now I woke up by myself with no memory of how I lost them. My mate all live in the country so aside from a very expensive taxi ride home they couldn't have got home. I also quit smoking about a month ago and woke up with a pack of fags in my poket. My jeans are blood stained, and I have a large cut around my gut and really badly grazed shoulders.

Any idea what the hell could of happened to me? Because I can't remember anything!