The Buffalo Bills got a little hot under the collar following their morning practice when numerous players got into a brawl sparked by a goal-line drill. Players are trying to say these kind of things "just happen," which they do -- but murder threats? No, those don't happen all the time:

Things going well at Bills practice. pic.twitter.com/ssdHLcKfQS — Kevin Clark (@KevinClarkWSJ) August 20, 2014

Here's another video of the fight, warning: It has some NSFW language.