Jitterbugs.

Stan and Ollie are musicians travelling across the country as "The Original Zoot Suit Band" They are rescued by Chester Wright, an inventor who has perfected a pill which will turn water into gas. Chester is a small-time con man who switches a water canister with a canister of gas when the duo aren't looking. The trio's sales pitch is initially a success but their scam is soon uncovered when a customer returns after having poured the "gasoline" into his car.