There two completely different things... A pretzel is when you change your direction of spinning on the rail; so lets say you spin a left 270 on, and than you spin a right 270 out, that would be a 270 on pretzel 270 out. That also apply s for any switch ups. Scissors is a term people use to describe edge pressure, like you dig our skis into the box or rail to get a better grip on it, unless some1 made a a trick called a scissor and i never heard about it...