You've done it now. You tripped on the rug during your living room dance party and landed right on your head. Your head definitely hurts, but a glance in the mirror won’t tell you if you have a concussion. The CDC defines a concussion (sometimes called a mild traumatic brain injury or mTBI) as a bump, blow, or jolt to the head, including whiplash, that results in injury. Concussions impact more people beyond the athletic community — and beyond your living room dance floor. From older adults to young children to military personnel, people of any age can suffer from a concussion.