Have you ever heard of DCS Centurus? It's a thing that comes when you come up too fast while diving deep dives. I was down at 80ft and it turns out I came up to fast and when I hit the surface I was hit by DCS, I couldn't move my left leg and I could feel nothing because of the pain. I have a slight reminder of that incedient, also with being with the Flu, I can barely move, unless I want to drag my left leg into an iron bar.