Mind the Gap returned a Wer Floor Sign on Recharge

So over the weekend Flight, I was using the Repulser to launch enemies off the edge on Recharge, near the Hammer Spawn. It won’t always give me the Mind the Gap medal but I didnt mind. When I did get the Medal I launch the enemy and when they hit with a splash a wet floor sign can flying back up in return. (Which i was confused and laughing at)
Did anyone else run into this?