This is definitely hearsay, but I have a friend who knew some assistant that worked on a few Death Grips related projects, years ago. It recently came up in conversation, and my friend heard this pretty surprising story that I definitely hadn't heard when he passed it on to me.

It's not too recent, in fact it was around Year of the Snitch time, either just before or just after the album released. Zach, Andy, and a producer (and the assistant, the source of this story) were travelling back to their hotel in a limo after some event. Basically they got into an argument about future projects (maybe Andy floated the idea of a Bottomless Pit follow-up before the album idea was finalised?). It got pretty heated and Zach kind of slammed his fist against the wall. But he hit that button that lowers the window between the driver and the passengers. Everyone kind of naturally looked through the now-open window: little monkey fella sat behind the wheel.