The Rail Walk or Rail Slide is a move that was perfected by "Tennessee Kid" Cooper. He used it to be able to get away while robbing stage coaches and trains.
To Rail Walk or Rail Slide, jump above a wire or rail that has a blue aura above it and push . "Tennessee Kid" Cooper's section of the Cooper Vault is comprised of sliding on train rails in the shape of a Figure 8.
Sly Cooper learns this move after defeating Muggshot in Sly Cooper and the Thievius Raccoonus. In Sly 2: Band of Thieves, Sly 3: Honor Among Thieves and Sly Cooper: Thieves in Time, the Rail Walk is used in the Tutorials.