I Was Face Timing My Boyfriend Tonight Before We Went

I was face timing my boyfriend tonight before we went to sleep, like always, and suddenly I heard no replies and he started making noises like he was throwing up or choking and I hung up and called his parents who rushed in and said he was thrashing and jerking but he was completely aware of what was happening because when his mother came into the room she said it startled him. I'm afraid he's having seizures and I'm scared and don't know what to do.