Transcript:
The other day, my grandpa said I was going to get old, and get shorter, and have to wear glasses and go to the bathroom a lot. Not me, dude. I'm gonna work out and stay fit 'til the day I die. Not yet. I'll start when I first feel old coming on. Me, too!
This reminded me of John Cleese in Monty Python and the Holy Grail, saying “She turned me into a newt!”, whereupon everyone else in the scene turns to stare at him.