When playing football I sometimes do things that I can't explain.?

I'm 21, and play quite a lot of football each week, i've always been a solid reliable player but never done any more than my job. Recently while playing 6 and 7 a side things have been happening that I just can't explain which are completely out of character. Like today for instance I took the ball at the half way line took it around about 5 players and slotted it home with ease but it was like it wasnt even me who was doing it, when I was doing it I wanted to stop but almost couldnt and then as soon as I had put it away I realised that I had pushed my body well past what I can do and just hobbled around for a bit in pain. Does anyone know why this keeps happening and how I can make it happen more. I also felt a bit strange and quiet afterwards.