Knowshon Moreno cries rivers of tears ... like, literally

Something really got to Broncos running back Knowshon Moreno on Sunday.

While listening to the national anthem before Denver took on Kansas City, Moreno was seen on the sidelines getting teary. Explosively teary. Check it out:

The tears seem to shoot out of his eyes ... strange, right? More than one person thought so.

What could make Moreno so upset? Or are those eyedrops? I hope, for his sake, it's eyedrops.

(GIF courtesy of KissingSuzyKolber)