3 yo boy was trapped under a Peloton Tread Plus, found by his father to be not breathing and pulseless - he was resuscitated and now has significant brain injury. He was found to have tread marks on his back matching the slats of the treadmill, neck injury, and petechiae on his face, presumably from occlusion of blood flow.
Tragic. I assume that the tread is covered on the bottom of the machine. I wonder if it was leaned against a wall and he pulled it over onto himself.