i think i had gotten a full SP one night when i was trying to relax my body. My arms and legs and the rest of my body tsarted to feel like dead weight and then they felt like floating. i felt a rushing feeling going through my body traveling fro my torso to my feet. I'm pretty sure this was a SP right?

but i have a question. As it passed through my body and went through my midsection it gave me an erection. Is that normal or anything? Maybe a stimuli from the weird sensation SP gave me conciously?