It was pretty funny indeed. This is what happens when you do enough damage to it such that his head fails off. If you notice, the usual mechanisms of the see-through wall appearing is still active, however instead of him standing behind it, he's chasing you guys around. Because of the wall mechanisms that usually makes him immune, he remains so while chasing you. Therefore, you still have to stand on the plates to get rid of his immunity. That's the only way to go back to a damage phase and kill him. Although this is not new, it sure made for a good laugh and may serve as a funny warning for New Light players. Ignore the trolls. As a matter of fact, the timing of this video is very apropos. Thanks for posting! PS: I'm pretty sure Bungie left it as it is to make for unforgettable moments like this 😂