As the film cuts between Hank and his friend watching the auto race, a pair of glasses appears on Hank's face, then disappears.
(at about 24 mins) During the slide show a cat is shown jumping in front of the projector, but on the screen the cat shows up as a relatively small silhouette. If the cat were truly right in front of the projector lens, virtually the entire screen would have been blacked out by the obstructing cat.
Mr. Stebbins receives a letter from his insurance company canceling his policy dated 1897, but his car is a 1906 model.