I rode Stinger for the first time a few days ago, one word describes it, "ouch."
I thought everybody was just overstating how much it beats you up, nope, on the return trip, coming out of the loop, the whole car sucker punches you right in the temple (
is a good example of this. Keep an eye on the restraints, whenever they shake or move around a lot, they're coming in contact with your head)
I'm tempted to ride it again sitting in a different car, but considering how much it beat me up the first time, I'm not exactly in a hurry to give it another shot.
You probably didn't ride it in the front row if you experience that much head-banging, I also ride the other rows sometimes and you do get some head-banging, but nothing to ruin the ride. I am used to rough rides though and don't mind going on them. I consider Stinger to be quite smooth and very forceful.
I rode in the same car as the one in the video, having watched the coaster from the employee lot a bunch, it seems that car gets whipped around quite a bit on the return trip. Next time I'm there as a guest I'll give it a shot on the opposite end.