I stepped through a trailer and took a corner to the inside of my knee. Knee got wedged and my foot never touched the ground. My knee was black for 1-2 weeks and swollen for much longer. I never missed a day of practice. I've had two concussions from football. I was doing box jumps and on my third set my right foot missed my less than a quarter if an inch. Stubbed my toe and came down on my shins hard. I've got scars on both shins about a quarter inch wide and 1-2 inches long. I think I may have broken my toe a few weeks ago because it hurts when I walk on it and move it sometimes but it never got swollen or anything so I'm just rolling with it.