I've had these occasionally. However, feeling like I've been slam dunked is a little different. I went to bed last night with ear bud headphones in and Schumann's Resonance on repeat. I was about 15 mins in and I thought I hadn't quite drifted off to sleep when it felt like I was suddenly slammed into. I felt like my whole body bounced off the bed and back down again. I remember nothing after it until I woke up this morning. No recollection of any dreams.
I've not had a hypnic jerk that strong before in fact for a split second straight after I wondered if something had just entered into my body
This was a hypnic jerk wasn't it?