Down goes Johnny Manziel. The Texas A&M quarterback was having a pretty good season (fortunately for Floyd Mayweather) when he suffered a knee injury in tonight's (Saturday) game against Ole Miss. It was a non-contact one, and Derrick Rose fans know that's usually the scariest kind.

Manziel went down in pain, collectively breaking the hearts of Aggies fans everywhere. However, he was seen testing out his knee on the sidelines with a brace after being helped off the field. Manziel went back into the game, but after a while he busted out a scramble for a first down. Looks like the knee is all right.

RELATED: The 50 Most Bizarre Injuries in Sports History

[via SB Nation]