From my days in the FAA the only people who used to get hurt by bang seats were armourers.
The ejector seat bus which travelled to all air stations to give refresher lectures had an ejector seat drogue. The drogue is a parachute which is attached to the seat and automatically fires on ejection. The parachute is there to stabilise the seat. Attached to the parachute line is a cylinder made of metal, this is fired out by a cartridge and deploys the chute. The particular drogue and line had passed through an armourers head, amazingly the armourer lived to tell the tale. I'm sure that Higs, and other Wafus of my era will remember this.