I learned double lincolns and over flips. I can double cork, but am no where near the height needed to land on my feet. They aren't that hard to do, just don't open up after the first cork and you automatically do it. I only landed the double over flip about 5 times becasue I had to get tons of air and that is hard without anyone to double bounce you. I want to learn double backs, but they are so scary. I can do standing to backflip and then landing on my back (1.5 flips) but I could never commit to the double.