If you consider playing hide-n-seek a sport, then that is how i got my worst injury. Wehad an abondoned house as base, my freind was chasing me and i tried to get to the steps of the house. Another kid was running towards the stairs at the same time, and he cut me off.
I tripped and flew face first at full speed towards the steps. The steps were worn down and jagged.... I ended up getting carried down the street by one of my neighbors back to my house. My mom called for an ambulance, and i ended up splitting my lip in half, losong 3 teeth, 1/2 of another tooth, splitting open my gums, and getting 23 stiches on my lips to close it all.
Now if you don't consider that a sport, then i'de say my worst was breaking my leg right below the knee on a street curb. we were playing football in the street, Itried to make a sidelinde catch, and slipped. i dropped with my full weight on the curb, snapping the bone in half. It left a pretty nice scar.