An Animal Crossing: New Horizons fan was probably enjoying the 2.0 update, minding their business, when they accidentally watered too close to one of their new fences. For some reason, the fence's direction changes suddenly. After making sure they knew how they did it and if they could do it again, they shared this unusual interaction on the Animal Crossing: New Horizon subreddit.
Usually, nothing happens if the fence gets watered, not even an animation for the water dripping off of the wall.
Read more on gamerant.com