I
I can only go off of my own experience with a back injury. Even after recovery it's not impossible for a sudden movement to trigger pain, a spasm, etc. When that happens, you're gonna stagger. That's why I accept the possibility of it being a factor here. I have no way of knowing for sure that is what happened, I just know it is possible. I've also been through concussion protocol at the high school level with someone over the last month, so I have a much better understanding of how it all works than I ever did. Doesn't make me an expert by any means, but it has definitely made me a non believer in the idea of an eye test telling us if someone is concussed or not. Some of it can be so subtle, which is why that first examination is so key to the process.