Random (Global) Anime/Manga Buttons

I could be blind and overlooking it but is there any way to pull up a random anime/manga on a sitewide scale? Not something on a particular list but rather from the site as a whole. If this doesnt currently exist it would be a nice and likely easytocode addition depending on how the database is structured. This should be as simple as directing a user to /anime/ or /manga/ where is a valid ID for an anime or manga respectively. Some sites implement this as if the ID is missing from the URL such as just /manga then go to a random ID