|The Thunder Flop knows neither friend nor foe, only destruction.|
The Thunder Flop is a signature move of Murray's, and can take out a guard if used from high enough in the air. It was first introduced in Sly 2: Band of Thieves, and makes a return in both Sly 3: Honor Among Thieves and Sly Cooper: Thieves in Time.
The Thunder Flop is a default move for Murray. It is activated by pressing either or while in the air in both Sly 2 and Sly 3, and by pressing while in the air in Thieves in Time.
When performing a Thunder Flop, Murray will orient his body parallel with the ground and splay out his arms and legs, then fall towards the ground at high speed, until slamming down and causing a shockwave, after which he stands back up quickly. Buying the Raging Inferno Flop from ThiefNet causes a flaming shockwave to emanate from the point where Murray lands.
- In inFAMOUS 2, a Trophy named "Thunder Flop" can be earned by having Cole MacGrath perform his Thunder Drop ability from the highest point in the game.
- In Sly 2 and Sly 3, it is possible to immediately take out an unsuspecting guard by Thunder Flopping onto the guard's head.
- In Thieves in Time, the variant of the Thunder Flop has been replaced by the purchasable El Drop'o.