This is a pretty simple trophy to unlock, use the first princess you are able to save (Barbara) and enter Teensies in Trouble, then Creepy Castle. Towards the beginning of the level, where the first set of double chains you can slide down there is an enemy on the ground. Go down and kill him, then return to the top of the hill. Get a decent running start, and slide down the slope. Hold down until you top moving, and there you go.