"Ooooh," Quantrain nodded with a knowing grin, "that's a very popular choice. What size would you like?"
The boy looked down at the amount of money in his hands. "Um, I have four dollars. What can I get with that?"
"Hmm," Quantrain murmured. "Well, normally our extra-large size is $4.50, but I'll give you a little discount, since you're my first customer today." Of course, he thought to himself, there may ulterior motives in giving this boy the biggest size possible, but what harm is there in a little charity?
"Really? Thanks a lot!" Andy's face lit up into a cute, toothy grin.
It took Quantrain a few minutes to fix up the smoothie, and he made sure he mixed the formula in there well enough to hide it's somewhat-unpleasant taste. Once he was done, he turned around and handed it to Andy. "Enjoy, son!"
"I will. Thanks again!" Andy waved as he turned around and walked away, sipping on the smoothie as he did.
"Now we just have to play the waiting game, and see how long the formula takes to go into effect," Quantrain said aloud to no one in particular.
It wasn't very long. Within a minute, as Andy was still within the food court of the mall, the boy started to feel his skin tingle all over. The feeling was rather pleasant, but another, less comfortable feeling was coming upon him: that of his clothes starting to feel tighter.
"What's going on?" he wondered as he looked down at his body. His shirt was starting to ride up and reveal a sliver of skin around his stomach, his shorts were squeezing against his thighs, and his toes were pressed up against the ends of his shoes. "Am I-- Am I grow--"
He got cut off as a huge growth spurt suddenly overtook him. Within seconds, his height jumped from just around five feet tall to well over eight. His clothes ripped to shreds and his feet burst out of his shoes, and he was still growing, starting to rise above the heads of the adults around him.
"Well, this certainly is interesting," Quantrain chuckled as he watched from a short distance away. A few screams could be heard as some in the crowd started to panic and run away, while others just stood and watched in amazement as this young boy continued to grow bigger.
Andy couldn't believe what was happening. As he neared ten feet, he looked down at the table where his half-finished smoothie was sitting. "Could it have somehow made me grow like this?" An idea started to form in Andy's head, and his grin started to widen.