Small pennants appear in secondary media items in the movie E.T. 1982. When E.T. is reading an ABC book, he just happens to be looking at pages with the Letters D and C. On the Letter C page, a castle is shown. Upon lower red tower is a storybook castle pennant.
Although the letter D is the dominant page in the shot, on the right you can infer the Letter C page is there due to the word 'cat' and 'castle' appearing. Most importantly here, for vexillology's sake, is the castle pennant.
However the pennants are on the lower comic where it features a tent pole with the pennants on top. It is only an amazing vexillological coincidence that pennants would appear twice in a similar fashion in this movie.