"Dustin, I think you will be an inch shorter than anyone you meet."
"Hey, Ty, I'm still a lot shorter than an inch shorter than you."
"Dude, your shrinking is one-way, no grow-backs, so avoid short people."
The door bell rings.
Dustin opens the door and is horrified to see two 4 foot girls.
"Would you like to buy some Girl Scout cookies?" they ask in unison. A third one pushes her way forward, she's only 3' 6".
"Noooooo!" Dustin screams as he shrinks down to 3'5" right before their eyes.
"Hey, he's shorter than we are now. Hey, Melissa, go get your kid brother out of the stroller, let's see if he'll shrink smaller than a two year old?" Melissa runs back to the stroller parked at th end of the walk.
Dustin looks up at the 4 foot giantess carrying her 19 inch brother toward him. He instantly knows he is 18 inches tall.
"No, please, I'll buy all your cookies, just don't--"