Frantically, Timothy fit key after key into the "shrinking" chest until he found the one that seemed to go with the "Down-arrow button". Sitting down to gain more head room, the giant boytoy held his huge breath, clenched his eyes and pressed the button. The lid sprung open, but -this time- there were no tiny pebbles inside. Instead, a thin, almost invisible fog drifted out, wrapping his hands with a cool vapor. He almost dropped the chest in surprise, but recovered and merely put it down on the coffee table and turned his attention to himself.
The floorboards still seemed to be getting smaller underneath him as he looked down at himself; the arrow hadn't worked!
"Wait a sec..." he thought and squinted closer. As he peered at the wood just past his right leg he could just see the rate of growth slowing down. "YEAH!" he shouted, and quickly put his hand over his mouth at the booming sound his voice made.
As minutes passed his growth got slower and slower and -finally- stopped.
Timothy waited, looking at the floor in relation to his own body's size. Nothing further happened. "Maybe they cancelled each other out," he thought aloud, and slowly tried to stand. His head bumped the ceiling and he glanced up to see that -even seated- he was almost scraping against it.
"Holy shit," the sixteen-foot-tall man muttered to himself. "How'm I supposed to get out of here, now?" Slowly, he glanced back at the box.