Attempted EILD

I had a friend sleep over cause he was sort of curious how I was gonna do it, so I decided to try a EILD for both of us and he stayed a little awake rather then me who try to not move or anything and WILD at the same time for some reason, then like 5-10 minutes into laying there I suddenly woke up and screamed and like my whole body jolted and my legs and arms shot up in a funny way. I have no idea why this happened nor do i remember anything nor could have written anything. Has this ever happen to anyone?

It sounds like it was a hypnagogic jerk.

Yeah, I don't think is had anything to do with your EILD. It just happened to occur then.