Skull Trumpet, also known as 'Doot Doot,' features a low-fidelity 3D animation of a skull playing a trumpet, first appearing in the mid-1990s as part of a Microsoft 3D Movie Maker clip. It gained viral status on YouTube and Reddit in the early 2010s, often accompanied by the 'doot' sound effect and a wish for 'good bones and calcium.' The meme becomes particularly popular every October, known as 'Spooktober,' where users share it to celebrate the Halloween season. It represents a wholesome yet surreal form of internet humor centered around skeletal antics and thanking Mr Skeltal for healthy bones.