Synchronized nose and banjo picking.

Roller skeet.

Fencing. REAL fencing. Not with those sissy electric swords, but settin' postholes and stringin' barbed wire over sage-covered hardpan.

HALO jumping -- you cut didoes and capers on the way down (as in diving), and the person who opens their parachute at the lowest altitude demonstrates how a winner can also be a loser.

Modern and Classic Sextatholon.

Bowling.