The one man show is a way of "spoofing" a film by having one person portray every part in a given scene. This type of filming requires a great deal of closeup shots and preproduction planning. By avoiding the use of long takes and wide shots, you can effectively use the same person to play each role (both male and female). By using costumes that reflect the spoofed character without masking the actor's actual appearance, you can be sure that the audience will catch the spoof.
Of particular importance when creating a one man show spoof is the way in which you handle different characters' emotions and demeanors. Simply duplicating each character with a single actor is not effective. You must exaggerate the more humorous aspects of a character's personality. For example, if you choose a character from the original movie that got rather intense during a scene, having the spoofed character remain intense during inappropriate moments could be effective.
Film combinations work by combining two unrelated films into one humorous presentation. To be effective, choose films that are on completely opposite ends of the spectrum. For example, you may wish to choose both a love film and a horror film. To create the spoof, your story could involve the murdering antagonist falling in love with another unlikely character. You must ensure that aspects of each film are readily injected into the spoof's plot to make the film an effective humor film.
Some filmmakers find success by greatly shortening a film to create a comic effect. For example, you may construct a 15 second film based on a film that runs for two hours. In doing this, do not simply summarize the film. Instead, take scenes from the film and reorder them to create a different impression about what the original film was about. A serious drama can quickly become a light comedy depending on how you reorder the scenes. This is a type of spoof that requires the viewer to have seen the original film, however.