I've been experiencing this for quite some time. it doesn't come often which is a total relief but it is super scary anyway. just as i am about to doze off to sleep (which is very difficult for an insomniac like me) my body freezes up. the thing is, i am still awake and i cant move a single part of my body, scream, talk- nothing. then there's this loud, LOUD noise in my ears that annoys me.

i 'unfreeze' after frantically trying to move again. usually within a minute or so.. it's a horrible experience. really.