I also would get these spasms but never really put two and two together until now!

I find it happens most when I'm sitting/lying at peace. In the hospital we had to do a relaxation/meditation thing and it was horrible. The whole time my body just went nuts twitching in different places in a few second intervals. I was always worried someone would notice.
Bedtime can be frustrating too!

It's usually my arms, legs and worst of all, my neck. I've don't think I've noticed it in my face. It's not really a problem to me, just a bit annoying.