Behave Yourself!

is a 1951 American comedy film directed and cowritten by George Beck, starring Farley Granger and Shelley Winters and released by RKO Radio Pictures.

Mild mannered young CPA Bill Denny forgets about his and his wife Kate's second anniversary until the last minute, when a small dog starts to follow him.

Every time Bill goes to answer an ad, he finds a dead body on the premises and always manages to leave panicky clues that he was at the crime scene.

Meek,mild "Max The Umbrella" is assigned to 24-hour rain or shine lookout duty at the spot where the dog was SUPPOSED to pass by and deliver the message.

When Kate happens to walk past the spot with the Dog, Max thinks she's "part of the mob" and hands her the goods---100 thousand dollars in counterfeit money.