Whether it was the flower arrangements or the music that set him off, one unhappy "ghost" made sure that the bride and groom knew he wasn't having it. As you can see from one reddit user's selfie, there appears to be a rather displeased face lurking in the background of what is an otherwise adorable memento. Grimacing ghost or not, one thing is for sure: the photobomber certainly did not receive a wedding invitation.
A headless goddamned ghost appears right in goddamned front of them. You literally see it materialize on camera -- of all the entries on this list, this is the one you absolutely have to watch (here's a shorter version that cuts right to the ghost if you don't have 4 free minutes). Seriously, your mind will be blown like Eric Stoltz's penis in The Rules of Attraction. As they swing the camera lazily through the room, the ghost just walks very purposefully toward them like it's delivering a pizza, while a long, low moan emanates from its phantom lungs.