This is not the first time that this has happened in football, and nor will it be the last. Buffalo RB James Potts did a hop-step when he entered the endzone and immediately grabbed for his knee. It is safe to assume that this is at least a ligament sprain, with the potential for a tear. Potts had previously missed last year with academic issues, and this touchdown score was on only his second collegiate rush.
Here’s another embarrassing football celebration injury:
You’ll notice that it was only the first quarter, so Bill was a bit excessive.