Jon just wanted to get back to his house and hide. He was sure everyone at home would have left for work, school, daycare, or whatever -- who knows who actually went where with all the personality swaps. However, there were plenty of opportunities to run into people along the way. Jon tried his best to avoid all contact, but he soon found that it would make no difference.
He passed by a young mother with her infant child. He tried to dart to the other side of the street, but it didn't stop the effects of the personality mix-up. As Jon continued to walk, he suddenly felt his underwear getting quite wet. He had peed himself. He started crying severely. He realized he had swapped elements of his personality with the infant. Crying just seemed like a viable solution to many of his problems. If he cried hard enough, maybe someone would give him a ride home. Maybe someone would change him. It didn't seem anyone was responding, so he continued on his way. He'd have to change himself when he got home.