Fifty years of hard work had finally paid off. And David held the proof right in his hands. It was his wife, Eloise, although nobody would have recognized her.
David bounced her in the air like she was a pre-schooler. In a sense she was. She was wearing a panty that her pre-school grandaughter had left on her last visit. And it fit perfectly.
"With this Fountain of Youth potion, we'll be rich and young," David laughed. "Let me put you down and finish mixing the regrowth formula. Enough to make you about 25, anyway." David had carefully proven his success at controlled regression and aging on animals before the first human test which had been conducted just 30 minutes before.
"One more bounce pwease," Eloise begged, screwing her face into a pout. She was enjoying her new found youth and wanted a few more minutes of extreme youth.
"Okay," David said, heaving Eloise high in the air once more. Only this time she didn't stay up. She fell hard on her bottom, knocking the air out of her. Stunned, she recovered her breath only to use it to cry like a baby for several minutes.
When she recovered her composure, she realized three things: her thumb was in her mouth, her panties were quite wet, and her only hope for returning to a normal age was lying dead on the floor from a heart attack caused by that final bounce.