I was rooming with a friend in Colorado for a few months and we had our tvs and stations next to each other. He had a tiny little mutt that took a shine to me, lap dog and fellow who grew up with cats. He had trained this tiny pathetic looking ball of fur and halitosis to 'growl' on command any time she heard someone walking around that she couldn't see or anyone making a threatening/looming gesture. So I'm sitting there with this little friendly old pup nestled against the chair arm as we're entering the Crota fight, and he raises his arms like a zombie and looks at the dog. "Dude the -blam!- is that? Is-is that Crota?" "Is someone shaving a cat?" "What the hell is that?!" "Dude that is the most terrifying sound I've ever heard in Destiny. What -IS- that?" Meanwhile roommate is trying desperately not to snort beer and suppress his laughter. Everyone else can't help but laugh after a few seconds of this. Finally I explain what was going on and after a quiet pause my friend turns his head sharply to look the dog in the eyes and she starts growling again on cue perfectly. It was subsequently determined that the dog Angel was the true final boss of the raid. My roommate consequently tried to make her growl anytime I was in a party chat/fireteam and had her sitting with me.