Kid projectiles = multiple kids on a trampoline + shifting “ground” April 27, 2017April 28, 2017Dr. Barry Dworkin Health Headlines Commentary for April 27, 2017 [display_podcas Related posts: Bike helmet standards falling behind science of how concussions occur Helmetless football practice can improve skills to avoid in-game head injuries The slippery ice Unfortunately, the first Ottawa flu death will not be the last