Sometimes we like GIFs because they send a short but sweet message, other times we dig them because they feature a scene from our favorite movie or a funny moment that fits nicely in a three to five second clip.
But GIFs that horrify rather than amuse are much more visually effective, and they can say things in silent motion that no still image could ever manage.
Set one of these suckers in motion on a coworker's computer screen and watch them squirm and schedule a meeting with HR, or stare at one when you're feeling down to remind yourself how human you really are.