Colburn had an injury last year where he planted and got tackled high and his leg was wrenched around under him. I cannot remember the opponent, but it was a on day he was running rampant, and the injury I think occurred after about a 10 yard run up the middle and on the opponents 15 or 20 yard line. It was a knee and watching it on TV in real time and then in slow mo (and also having had multiple knee surgeries), I was pretty sure in the moment that he had just torn his ACL. He stayed on the ground and limped off the field.
He ended up coming back in the game. The kid has body and bone strength from the waist down that is really unique IMO. I am sure there are about 7 or 8 NFL running backs that are built the same way - Dion Lewis comes to mind. My only personal comparison would probably be Tyrone Bogues who I played quite a bit of pickup with at Wake when I was there. He was practically a dwarf from the waist down and you just knew running with him that knee problems were just "never" gonna happen.
Caveat being "never" to a 20 year old equals next 15 years. If memory serves, Mugsy's knees are what drove him from the NBA, not his height.
So, while it looked awful, if there was one guy on our team who could recover in 9 days from a bad ankle sprain, it would be Colburn. If there was a guy who could seemingly have a bad ankle sprain and end up only having a bone bruise that would have been an ankle sprain for anybody else, it would also be Colburn.