My wife was hit last week in her car, at about a 45 degree angle, across the passenger side. Not a jarring hit - none of the airbags deployed, and she didn't hit her head on anything. Still, she sustained a mild concussion. Her thinking has been impaired since then. We are watching her slowly recover, and she's clearly regained most or all of her logical and analytical ability. But here we are a week later, and she still can't multi-task, can't handle crowded environments or the slightest loud noise, requires lots of extra rest, and is easily frustrated and irritated. She's normally a very high functioning person, and is CEO of a $MM multistate nonprofit, so the before-and-after distinctions are very clear. In time, she'll be ok, albeit more susceptible going forward. This is her third. First was at age 20 in a horrific car accident where she was thrown 100 feet out of a flipping car. Second was about 5 years ago in a slip and fall, where she was knocked out cold. This one only required a sudden stop, with no direct impact and only a little bit of whiplash (she had only the mildest of muscle soreness, and she's in her 50's). It certainly gives me pause when I think about sports injuries. The one five years ago was a violent, direct impact. This one was far from it.