re: A Colorado Springs “street takeover” ends about as well as you would expect.

Just from the looks of it, I would guess that not only was the leg fractured, but this one also has significant spinal injuries and a pelvis broken in at least two places.
Pelvic fractures are also notorious for having significant internal bleeding due to the large number of vessels supplying blood to the pelvic region. These kids ,in their stupidity, likely suffered tragic injuries that will carry thru with them the rest of their lives.