TY - JOUR T1 - Post-traumatic benign paroxysmal positional vertigo JF - Practical Neurology JO - Pract Neurol SP - 354 LP - 355 DO - 10.1136/practneurol-2018-002117 VL - 19 IS - 4 AU - Colin J Mumford Y1 - 2019/08/01 UR - http://pn.bmj.com/content/19/4/354.abstract N2 - I am a reasonably good skier but on a recent holiday I had minor accident, although looking back maybe not so ‘minor’. The circumstances were idiotic: skiing on a flat piste and trying to carve a double helix pattern in the snow, I collided with one of my companions, landing sequentially on head, right shoulder and right hip. I was winded but not knocked out. Over lunch, we noticed that my ski helmet was dented (figure 1) but I was fine to ski all that afternoon.Figure 1 Damage to the side of the ski helmet.I awoke at 04.00 hours the following morning with vertigo. The axis of spin was horizontal, in line with the orientation of my bed. It was extremely unpleasant, with a jerky sensation of movement as though the walls and ceiling were moving about 1/16 of a turn every second. I felt that my bed—when lying flat on my back—was slowly barrel rolling in the opposite direction, and that I would be thrown to the floor. Grabbing the bed sides, I was briefly fascinated to note that this was true rotational vertigo—a new experience for me—before realising I was about to be violently sick. On standing up, I fell … ER -