Here's a picture of the day I passed out at Six Flags Magic Mountain (taken before the passing out):
I'm in the middle--it was one of those brunette periods. I was 19.
There were a few different factors in the "why" I passed out, but that's all in the past, no need to rehash. It still ended up being a fun day once they let me leave first aid after convincing them I did not need to go to the hospital. We even got a no-wait pass to the ride I passed out in line for.