An evil practical joke.
About 15 years ago I worked at an international school library in Hong Kong and had part of a floor collapse under the weight of the shelving. The repairmen came and replaced the plywood and wooden stud floor with concrete. before the concrete dried I took a pointer and drew a tomb stone. The inscription read,
RIP
James Riddle Hoffa
2/14/1913 - 8/3/1975
The next day the workers laid tile over the fake grave. They had no idea what it said. I’ve wondered if anyone ever looked under that tile?
Funny. Maybe after 15 years of foot traffic, the pressure has caused the tile to sink into your inscription and made it visible once again.