Two words: Jump cut
In film, the jump cut, or abrupt transition from one frame to the next, functions like a quick, confusing, and incongruous utterance. The viewer is required to fill in the missing rationale or logic, although she doesn’t realize it. In humor theory, incongruity theory describes “laughter in response to a perception of incongruity.” The jump cut evokes humor, as seen on Vine, the popular short video mobile app with a growing number of aspiring and established comedians.
Because Vine is a short 6-second video platform that allows the user to manipulate time and space by pausing and dragging a scroll bar on a mobile screen, it’s the perfect medium to evoke humor through incongruous–or (also conceptualized as) bizarre, queer, inappropriate, odd, discordant, contrasting, “ridiculous” imagery.
The jump cut transition, along with the cutaway is oftentimes a meta comedic device also found in the popular animated sitcom Family Guy.
So there you have it: The medium, in this case, Vine, is the message, humor.