https://www.pcgamer.com/black-ops-4-emotes-let-you-see-around-cornerstreyarch-lays-out-plans-to-tackle-the-problem/

Call of Duty: Black Ops 4 came out yesterday (you can check out Steven's review in progress here), and players are already finding ways to manipulate the game's systems to gain an advantage over other players. Specifically, if you use a third-person emote, the camera will pull back and rotate at will, allowing you to peek around corners. It could prove especially useful in the battle royale Blackout mode, letting you see far-off players while hiding behind a tree.

You can see one such example in action below, courtesy of Reddit user -Sleeper_, who uses the Sitting Bull emote to crouch behind a low wall and take a good, long look at the surrounding area (-Sleeper_ is also the source for the image at the top of this article).