Film directors have inserted themselves into their work ever since they figured out that somebody else was able to keep the camera rolling. In fact, quite a few have become known for doing so (you can find a more or less comprehensive Wikipedia list here). While most of these instances of director cameos are barely noticeable and can be easily filed as interesting curiosities to bring up during a podcast recording, some filmmakers have become well-known for sliding themselves into the frame. Naturally, the go-to example is Alfred Hitchcock who did this in the vast majority of his features (again, a comprehensive Wikipedia list is a great resource), but even the most vaguely informed movie-goer would be able to name Quentin Tarantino, Steven Spielberg, Richard Donner or Martin Scorsese as filmmakers known to have appeared in front of the camera in their own movies for a brief moment in time.