"This is the science lab," he said when he got to the next door. And just like he did two seconds ago, he stood in front of the half-opened door and started talking. He didn't look at me once while he talked, which was okay because I wasn't looking at him, either. —Wonder
R. J. Palacio

Which detail helps you visualize Jul ian behaving in a nervous way?

Jul ian points out the science lab.
Jul ian stands in front of the half-opened door.
Ju lian starts talking.
Jul ian will not look at August.