Our experience was mostly silent. Ridgid. Spine curled backwards. Eyes unfocused unseeing. Sometimes drooling.
We would get her into a soft spot like a bed or towel. Don't go before the paralysis is set - you might get bit. The comedown is also hard. Soothing voice. Gentle touch. Let it run it's course.
The medication was a simple salt solution, potassium something?
Does that help?