My neighbor and I are currently building a rollercoaster in his backyard. It starts 20 feet off the ground and the drop is 15 feet. We started it in the end of august and finished the track around the beginning of October. We still cant seem to make it work successfully. We have failed at the same spot multiple times with humans on it as you can see in the video. Please give us suggestions on ways to improve this so it works. We really want to ride a rollercaoster we built. And please subscribe, share, and like all of our Youtube videos. We want a lot of people to see all the hard work we put into it.