Minecart name screwed up?

Here is the situation that leads up to this.

I was attempting to exploit an old bug that would allow me to see through blocks to get a better idea of where caves were in the area.

As seen in: https://www.youtube.com/watch?v=PM7je8AC7QU

When I realized that the glitch failed, I went to break the minecart.

Upon breaking, the minecart possessed this name.

Just thought I would report this. I have not tried to duplicate this issue because it would be a waste of my iron, and I am playing a non cheat world with no mods whatsoever.