float on

[Ksguo]

BlackBerry obsessed:Mr. "I Can't Look Away From My BlackBerry": Located most often in bustling city-areas and in/around technology tradeshows, you'll never see this guy's eyes...but he'll seemingly see you. Or at least he'll avoid you when your paths cross. That or he'll move directly at you until you shift out of the way. Regardless, the result is the same: The BlackBerry Businessman floats on, eyes downcast. His only true weakness: curbs and single steps.
Question one：What is the meaning of ‘float on’ here？
Question two：Is the expression ‘That or he'll move...’ correct grammatically？

[Jamie (K)]

Question 1: "Float on" means "continues to float ahead".
Question 2: "That or he'll move..." is grammatically correct.