Ty decides he had better expand the teen's body to keep up with his cock.
Very quickly, his feet burst from his shoes, pushing out to over size 20. Then his hands ballon out, big enough to cover his whole face. Then he stretches upward. 6 feeet tall, 6'2", 6'4 all the way to 8'9". (The mall has high cielings).
Now a gigantic basketball player is standing naked in the middle of the mall where the teen used to be, his cock hanging down five feet to the ground.