The Green Triangle (often abbreviated as GT) mount was invented by Paul Escolar. It is basically a knot with the yo-yo sitting in the loop. Because of this it is critical which side of the mount the yo-yo is popped out on, as one side will result in a knot. Which side you should use varies from trick to trick. Due to the advanced nature of the trick, it is a fundamental element of modern 1A play, as Green Triangles can be landed within a plethora of other maneuvers.