I was able to finish level 18 with a huge skip, shaving off 10 seconds from the record, but I don't have any proof of it. Specifically, 16.44.

If you get launched off of the second obstacle in a certain way, you'll land on the goal. I got a 16.44 with this method. Please feel free to tell me if you can get a better time with it, or if it breaks any rules.