We know their rivalry is alive and well via Rolling Stone and Twitter...
Allow us to elaborate on our theory!
Now back to the present…
[Image via AKM-GSI.]
This resting b*tch face fuming is EVERYTHING!
We still have no clue as to what caused the singer's violent behavior with her brother-in-law, but it looked like she was really trying to hurt him!
Luckily, Jay and Yoncé kept their cool throughout the entire ordeal, and you'd never believe what went down by looking at their faces in the (above) photo right after the brawl!
[Image and Video via Splash News.]