Trapeze to Triangle Whip Help

Everytime I try to do it, it doesn’t even come close to looking like a triangle at all. I just get a big messy knot. It doesn’t look that difficult, but I just can’t seem to do it. Please help.

Have you learned hook? It’s just that, except you cross your TH to the front of the formation before the loop hooks the yoyo. Then make sure to curl your finger down and grab the string to form the green triagle.