[He's not entirely aware that his companion is a teeny bit compromised, but he is aware that spotting the exact point where the normal tiles meet the "fake" flooring could be a little difficult.

So, he helpfully points towards the spot, outlining it with his index finger.]

There. If you look closely, you can see how those four tiles don't quite line up with the rest of the floor. [Very, very closely.] But you're free to step on them to make sure, if you wanna take a plunge to god knows where.