H didn't know what to do with his arms while walking. He wanted to leave them straight by his side. But he had seen other people do the same and they looked awkward and uncomfortable.
H tried to casually swing his arms with his steps as those around him did. But he worried about people seeing through his attempt at walking naturally and calling him out as an impostor.
He wanted to fold his arms in front of him, or dig his hands into his pockets. But C once gave out to him about his body language for being too cold and “stand-offish”, so he didn't want to do that.
He decided to put his arms behind him and clasp his right wrist with his left hand, just at the small of his back. H walked comfortably in this fashion for several paces. He then worried that walking like this could appear old-fashioned and eccentric.
By this stage H had reached the store. He bought something to hold for the way back.
