Quicksand

Quicksand is a harzard that appears in certain Mario games. They are usually found in the desert and they are usually darker than the normal, safer sand. There is two types of quicksands: the ones that slowly pull Mario in allowing him time to jump out and the ones that instantly drag Mario under causing him to lose a life.

Super Mario Bros. 3
Quicksand mainly appears in World 2 of this game. Mario can jump rapidly to get to avoid getting pulled under.

Super Mario 64/''Super Mario 64 DS
Quicksand only appears in Shifting Sand Land for both of these games. Quicksand is a much darker color and as soon a character steps onto it, they get pulled under instantly losing a life.

Mario Kart series
Quicksand usually appears in desert-related levels of the Mario Kart games. Quicksand usually drastically slows down a character rather then pull them in. Heavy characters should always avoid this since they have poor acceleration.

New Super Mario Bros. series
Quicksand always appear in the desert level of this game series. Like from Super Mario Bros. 3, Mario can jump rapidly to avoid losing a life. In some situations, sinking under the quicksand leads to secret paths and secret exits.

Paper Mario: Sticker Star
Quicksand appears in World 2 of this game mainly in the levels Drybake Desert and Sandshifter Ruins. Mario can jump over and over again to escape but he must be extreamly careful. Sinking into the quicksand instanly earns him a Game Over.