Well, two things really.

It was a very violent dream.

First of all this knife-weilding maniac came at me, I woke up a few minutes later with blood on the sheets and a nasty gash in my little finger. I shrugged and went back to sleep.

Then a few hours later I dreamt I was on the Rugby team, went to rigby tackle someone...and woke up nutting the bedpost. I had a black eye for nearly a week after. Oh, and my little finger had attached itself to the bedsheets under a nice little crust of blood.

Quite an interesting night really...