Haven't seen anything like this yet, so I'll take the first pass.
Company was bought out by large P.E. firm last year in what was a fairly large transaction > $3bn. Product organization was a real shit show prior to buyout and continued to be that way post buyout. Head of Product is utterly incompetent and focuses too much on innovation rather than rigor. Products turn to shit and growth nose dives (8% YoY to less than 1%). Lots of finger pointing ensues and the board steps in. Within the first hour of the meeting, board realizes head of product hasn't produced a product roadmap in over 2 years and instead shows them all the new stuff he's working on. Board gets incredible hulk level pissed and basically puts baby in the corner. They tell the CEO to let him keep innovating but not to expect the board to approve anything in the next 200 days. Head of product's responsibilities gets divided amongst other exec's and magically a 200 day product roadmap is produced in under 24 hours. Head of product has fallen off the map and hasn't been heard from since meeting.
Never seen a more public shaming and nut-clipping of an individual in such a public setting. It was unreal.