Don't believe the title, watch
THIS is how mayhem should be played. People blowing up all over the place into heaps of orbs.
I've had this happen a few times since the last Faction rally. From a single headshot (gun) I've had around 12 orbs from a single Acolyte on Titan a couple of times and my grenades suddenly became 'Masterworked' at the same time, giving out between 2 and 5 orbs per enemy sometimes. Weird. And beneficial, so expect Bungie to fix it real soon.