How to activate Black Ops 3's creepy Doctor Who easter egg on Nuketown 2065

Call of Duty: Black Ops 3 has a couple Easter eggs hidden on the Nuketown 2065 map - one for fans of the game's zombies mode, and one Doctor Who fans in particular should appreciate. Shoot the heads off all the mannequins around the map within a two-minute time limit and they'll come to (un)life as zombies. Do the same thing but aim for their arms instead and you might be reminded of the Weeping Angels. Either form can kill you, so be careful.

Youtuber "chaosxsilencer" calls the latter version of the secret the "freeze-frame mannequin Nuketown Easter egg," relating the mannequins' stop-and-go behavior to the Boos from the Super Mario Bros. games. But I think I'm gonna just call them Black Ops Angels, if for no other reason than to call myself The Doctor and drop some helpful advice when I play:

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