I haven't ever had anything like that happen while I was awake, but when I have been on certain meds, or really stressed or tired, I will sometimes have sleep paralysis, and feel like i'm going to have a seizure. I feel like if I could just move my arm or leg or get out of bed I could prevent the seizure, but of course I can't. Sometimes i'll even dream that I did get up and that i'm moving around my room, and then i'll realize it didn't happen and i'm still lying in bed and a seizure is coming on. It's always kind of scary, and i've never gotten a straight answer from any of my neurologists about whether or not it's connected to the epilepsy or not, but it does seem to happen in waves (it'll happen for a while, then disappear for a long time).