This was a skit done by The Alabama Boys.
"Flown in the 1946 Piper J-3 Cub, this act begins as Greg - farmer Clem Cleaver,
climbs up on the announcer's stand, demanding a flight lesson. Later in the show,
he "steals" the plane and takes off alone, with his whole crew chasing.
Grandpa shoots off a tire to get him down, and Clem lands on his pickup
truck driven by Grandpa Fred as it races down the runway."