I never had this problem before but please no advertising :) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Click that green flag :) I thought it would be cool to make a 100% pen skate cycle using trigonometry. It took quite a while to get all the numbers straight, but I think it turned out ok :) A while in I realized it looked sort of like the legs where just bouncing off of each other. So I tried to add a shadow, which I think adds a bit of realism to this project. :)