Although the glitch works on consoles saving yourself from fall damage will be difficult and cumbersome due to no quicksaves. To save yourself from fall damage in case you get launched up into the sky simply press quicksave and quickload. The fastest way of doing dashes is actually to double tap the swap ammo key (2), press pipboy (F2 or TAB), then fire (LMB usually), Up on keyboard to select the right gun (357 Revolver most likely) ENTER on keyboard then TAB to bring the pipboy down.
If you did it right you will have ridiculous speed for a second, and by binding your gun to a hotkey you can bring it up again and repeat the process for fast chaining. Then simply bring up the gun, move in a direction, swap ammo and bring up the pipboy, unequip the gun and bring the pipboy down again (Whilst still holding the movement key). To perform the glitch, get a weapon with a one-by-one bullet reload animation (.357 Magnum Revolver, Cowboy Repeater, Hunting Shotgun etc) and two different ammo types that fit the weapon. Reload Dashing is a Fallout: New Vegas glitch that allows you to slingshot yourself in a direction very fast.
