I had to mute the video because the music was killing brain cells. I already used this trick to complete certain Vanguard bounties such as killing 2 enemies at the same time with the Fusion Rifle. Can complete the bounty in under 2 minutes here. I have to say though I probably get more loot from "The Cave of Wonders", but the downside to that is a-holes can just sit at the cave and block the spawn which is not a problem here obviously.