Okay, so I did the most retarded thing just now so I thought I'd write about it...
I was laying down on my bed... kinda on my arm right... so i go to move and i cant feel a damn thing there... totally dead and i couldnt even move it... like paralysis...
So to wake it up I took my other arm and bashed it against the wall... like 3 times really hard too...
At first it was wicked cool because it didnt hurt at all...
then all of a sudden.. like 2 mins later it woke up... and I felt a very bad, and very delayed pain...
It was cool. Try it.. (just dont BREAK your hand...)