Board Thread:Questions and Answers/@comment-24837408-20140704104721/@comment-14600979-20140704210706

Uhm...

Well, you could just make a variable negative one for X amount of time, and in your "fall down" equation, multiply by that number.

This won't work if you have more realistic gravity, but it will work for a "five out of ten smoothness" (As long as the time that it's going up is short)

Again, it's not perfect, or anything close, but it takes minimal changes to set up.