I've had like two mild cases of sleep paralysis. The first was during comp-sci in high school. I woke up, but couldn't move for a few seconds, and I was like "WTF, WHAT'S HAPPENING!?!" And then I woke up and it wasn't shit. So I looked it up, found out what sleep paralysis was, and was like "huh. Cool."

The second time happened a few weeks after the first, and I was just sort of like "Okay, here we go." Also only lasted a few seconds, and was far less alarmed by it.