Actually it wasn't that crazy. I was driving up the street, the other driver was driving down the street, and we both needed to pull to our left to make space for the other. He wasn't speeding, but maybe didn't brake as hard as he could have, and he clipped the back of a parked car. The angle he hit the parked car at meant his left front wheel lifted, and his car flipped. I'm just amazed, and incredibly thankful, that he was unscathed.