Sheldon: Whatcha watchin'?
Gramp: The exciting sport of "Nascar"!
Sheldon: SPORT? Nascar is a sport?
Gramp: Of course it is. It takes an ATHLETE to control a mighty mechanical beast in sweltering, sweaty heat.
Sheldon: So... they sweat a lot and control a machine? By that definition, working in a steel mill is a "sport".
Gramp: Don't sass Nascar, lad.