Do you live in an apartment flat or an isolated house?
If you live in an apartment flat, it is perhaps possible that sonmeone else's toilet got blocked and they had
someone high pressure air blast their way through and of course your sewage pipe joins up with theirs.
It's a single family house with an upstairs and a downstairs bathroom. In theory a blockage would overflow the downstairs when the upstairs was used.
But there are splatterings of tissue paper on the shower door across the room 4 feet high off the floor.... This toilet did not overflow, it popped.