Mattheiu loses his grace for a moment, stepping out of time and it takes Lucifer a moment before he's sure that the man isn't going to trip and fall. Immediately there's a flash of concern that radiates through him, and he's making an attempt to steer them away from the crowd so that he can make sure his reaper is alright.

"Mattheiu, darling?" There's a touch of worry in his voice as he tries to navigate the both of them through the throngs of people, "I didn't think I was that bad a dance partner."

It's a joke, he has to make light of the situation because he's concerned.