Biplane is a Wilkins Coffee commercial from 1961.
Wilkins (the pilot), and Wontkins are in a biplane as Wontkins is the passenger. Wilkins asks Wontkins if he got his parachute, which the latter says he forgot. The former also asks Wontkins if he has Wilkins Coffee, which he also forgot. He falls out of the plane as Wilkins turns it upside down, saying that Wontkins won't forget "this!"