[Editor's note: But seriously, do not watch the video below if you are squeamish]
The above video is not for the faint-hearted or weak-stomached, as it features Tom Learoyd-Lahrs of Australia's National Rugby League having his knee rearranged in super slow-motion.
Learoyd-Lahrs just returned to the Canberra Raiders earlier this year after an extended absence due to a foot injury, but this injury will likely put him back on the sideline for at least a little while. As a matter of fact, just watching this injury will put most people out of commission for a little while.
Cherish your knees everyone, you never know when an Australian rugby player may take them away from you. [YouTube]