I have not seen a tutorial on the reflections technique. I used wax paper and stamped the image on it. I then turned the wax paper over and laid it on the card stock and lightly pressed. The image from the wax paper will transfer to the card stock. Then carefully lift the wax paper off the card stock. This will give you the reflection. Then take your stamp and stamp directly on the card stock above the reflection.
The technique was not hard but you have to be careful not to slide the wax paper on the card stock and smudge it.