Watch A Case of Spring Fever (1940) : Full Movie Online Free Advertising short for Chevrolet combining live action and animation. The film relates the story of Gilbert Willoughby, who, exasperated by his stubborn boxspring mattress, imprudently wishes for the disappearance of springs. Coily, the animated spring sprite, grants his wish, and Gilbert is bedeviled by once-familar appliances that no longer function. Apolo­gizing to Coily, Gilbert acknowledges the contribution of springs to daily life, especially in the Chevrolet.