In Henry Koster’s 1950 comedy Harvey, James Stewart plays Elwood P. Dowd, a good-natured sort who’s befriended Harvey, a giant invisible rabbit. At least, he seems to be a giant rabbit, by the way that Stewart spends the film looking up at him.
However, Harvey was meant to be 6’3.5″ and Jimmy Stewart himself was 6’3.5″, so he should be looking directly across at him.
In 1990, Stewart recorded an introduction to the film, in which he says that he’d decided that Harvey is actually 6’8″. This wasn’t actually reflected in the script, which is quite firm about Harvey being 6’3.5″, but then again, who’s going to argue with Elwood P. Dowd?