If you were spinning in the same direction for too long, you might have centrifuged the fuel away from the fuel line, or worse, pulled all the oil to one side of your engine block. Don't do that!!! As I'm sure you can guess, you can seriously damage your engine that way.
That happens sometimes on the skidpad, to disastrous results. You're usually supposed to do no more than 5 rotations in the same direction to avoid that.
"struan87 you are way better than Google!" --BCole
Pictures.