Okay, well - he wasn't prepared for this guy to pop up quite so suddenly. As such, he's caught completely off guard when.... Luka bursts onto the scene.

"Hey!" Luka jumps up from his position leaned over the switch. "A rat!? Really?"

He keeps a distance between himself and the doorway as he tries to gauge the other Luka's intentions. At least he had intimate knowledge of his surroundings, even if it was some kind of cube-generated simulation.

"I'm only sniffing around here to try and fix your fuck-up. What do you want?"