Body Slam

The Body Slam, also known as Double Leg Drop or Belly Flop, is one of Crash's moves. To perform it, the player must jump and press the duck button ( in PlayStation games) while in the air. Crash will slam down and crush anything beneath him. It was first used in Crash Bandicoot 2: Cortex Strikes Back.

Uses
The Body Slam can destroy locked crates (although the Super Charged Body Slam is needed to do this in Crash Bandicoot: Warped). Other than that, it doesn't have many uses. It can also be used to gain slightly more height from a jump, albeit less than the Double Jump in Warped.

Coco has an equivalent move in Crash Bandicoot: The Wrath of Cortex (a stomp attack) and in the N. Sane Trilogy remasters of the second and third games (a ground pound).

Power-Ups
The Belly Flop's Power-Up is the Super Charged Body Slam. It increases the radius of the Belly Flop by two or three crates.

In Crash Bandicoot: Warped, it is obtained after defeating the first boss, Tiny Tiger. In the Wrath of Cortex, it appears as a secret power-up, obtainable in Banzai Bonsai's red gem path.

Manga
Crash uses the Body Slam in Crash Bandicoot: Dansu! De Jump! Na Daibouken to try and impress Aku Aku and to 'clean' Ripper Roo's books. Instead of referring to it as the 'Body Slam', Crash calls it the 'Body Press'.