A reverse image search confirms that they were singing “The Wheels on the Bus” to a group of children. Most likely the part about the babies on the bus going wah, wah, wah.

FFXIV also kinda avoids this as well, if you grind for endgame gear it tends to carry you to a little over the halfway point or to the end of the next expansion before the patch cycles start. Like gear from 7.55 (last patch of old expansion) should carry you through most of 8.0 (new expansion launch).