Yeah, I’ve had to help a neighbor with that 1 time out of 100. The plunger was just causing the water to slam against the turd that had created a perfect seal and splash back outside the toilet. It probably took at least 5 uses with the auger to finally clear out enough crap to finally break it apart enough to let it flush.
Fortunately, the second time I helped them with a nearly identical situation, the plunger worked. But it still took a few forceful plunges in quick succession. I was worried I might have to use the auger again.