Although I'm unaware of it, my husband also says that my whole body shudders as I fall asleep and that I shudder many times through the night. (Lucky him.)
I also have an exaggerated startle reflex.

If you come up behind me while I'm holding a coffee, it's a sure bet we'll both end up wearing it.
I have a stutter that gets worse if I'm tired of flustered.
Cheers