She is laying horizontally and not standing vertically.  I wonder how she was able to have blood rush from her head in that position to pass out.  But hey, never underestimate the power of a good finger fuck lol.

But she sounded like a guy who was shot in the leg and I was waiting for an alien to pop out of her stomach.

Of course we all know it was fake, right?

I've seen it happen once... an ex-girlfriend passed out briefly after a very extended orgasm.  I don't know whether it would happen that bad but I believe you can pass out.