Well... I don't know how to explain, I was running and dribbling a basketball then I bumped to a thin circular metal thingy that is like 1.5 inches thick... I was so clumsy... and I think I need to rest more so my brain will heal, because I might just got a mild brain injury from that.... Well... but it didn't hurt, I didn't get dizzy, and Thank God that I didn't got a concussion from it... I wish that I didn't get hemorrhaged from it...