The man continues investigating the apartment. He investigates it very thoroughly, checking the faucets, the toilet, the pantry, the closet, all of the assorted electronics. Eventually he runs out of things to poke, and he wanders cautiously out of the apartment. The hallway's deserted. He prods the access buttons for the door across from his, which of course doesn't admit him. He does this for all of the doors, then wanders down the hallway, looking cautiously at everything.
There's a sign that says 'Fitness center,' complete with an arrow. He completely ignores it, in favor of wandering around some more. Many things are investigated, though not as thoroughly as the apartment was. There's only a vague resemblance to a systematic search, it seems more like he's a very lost, very confused individual that is trying to find an answer.
Eventually, he does reach the fitness center, but more by chance than anything else.
"Doctor Lewis," says the cool, synthetic voice of an operator, from a hovering white and green box. "Thank you for your prompt arrival. If you could please follow me, we can begin the test and have you out of here in no time at all."
The man stares at the operator as it floats off. After a quick glance around the room, he hesitantly follows.
The tests are set up in such a way that one can complete them while being supremely confused about what is going on. The subject is ushered into a room with a glass wall separating him from a small group of very human scientists.