Thomas greets his arrival to the Glade with “confusion, blistered with panic,” and he’s curious about his surroundings but too overwhelmed to initially act on that curiosity. He’s dizzy and bewildered. It’s also quickly clear that he feels a little detached from himself and his body due to both memory loss and the confusion of his new surroundings. When Thomas speaks, his voice is described as “higher than he would’ve imagined.” Not only are his surroundings unfamiliar, but the slang that everyone around him uses is completely foreign to him.
After getting his bearings, Thomas tries to calm his nerves by reminding himself that fear won’t get him anywhere; it will only make him feel worse. As the chapter continues, we see other aspects of Thomas’s panic, namely the anger at his captive situation and the rudeness of some of the boys there. Thomas talks to those around him, angry, and trying to get clues when his memory is totally blank of any helpful insight.