Apparently, it's all happening in Met Ball elevators. TMZ released video Monday morning of what appears Beyoncé's sister, Solange Knowles, going after her brother-in-law Jay Z in an elevator at the event last weekend. It truly must be seen to be believed:

You can see Beyoncé standing at the back, barely intervening. At one point she does adjust the train on her dress. She and Jay both remain remarkably calm as their bodyguard does his best to keep the attacker at bay. Below, you can see Solange enter the elevator, go after Jay, and land a kick (in stilettos). 

GIFs by Connor Simpson

Of course, the Knowles-Carters have not yet addressed the incident, and it would be irresponsible to speculate why this happened. In the meantime, let's remember what's really important: how the Kardashian family would compare under similar circumstances.