Can someone please tell me WHAT IN THE ACTUAL F**K ?!

So I was playing BO6 zombies on the Liberty Falls map, when out of nowhere this happened and I have no clue what the hell lol but after this particular clip ended, I still was able to not only revive myself, but to then continue to swim around and while doing so it was like I kept being pushed back-and-forth, depending upon my location at any given second, in between the liberty Falls map and another map that I didn’t recognize…. Lol