NOTE: This article was copied from the Abandonware Wiki, and means no harm.
An Interruption fad is basically exactly the name says: a fad that 'interrupts' the site in some way. There are two basic types of interruptions: those where the fad type is clearly spelled out in the title (most common with the Hassan fad), and those that aren't spelled out, making the presence of the fad a surprise.
Muhammad Hassan was one of the first interruption fads, and was based one the fact that the wrestler would interrupt people using his trademark yell.
NEDM isn't always an interruption fad, but is often unexpected.
WHAT THE F BOMB
Kanye West interrupted Taylor Swift at the Video Music Awards, inspiring sites where he interrupts other people.
Either a parody of interruption fads or a true interruption fad, Foot doctor consists of people's faces suddenly turning into "foot doctors"; pictures of feet with faces.
The rickroll is based on the rickrolling phenomenon, where a person claims to be linking to one video and instead links to a video of Rick Astley's Never Gonna Give You Up.
Based on the 4chan meme, this fad promises naughty pictures but gives the viewer Will Smith and the theme song to "The Fresh Prince of Bel-Air".
Like the Rickroll, Mangione'd usually tricks the viewer into thinking they'll see something else, but instead see a picture of Chuck Mangione playing his 1977 hit "Feels So Good". It was started by user PaRappa with the site.