I see way to often in the video posts people claiming "butter on" and all they are doing is a revert then getting on the rail normally.
I may be preching to the choir but it seems way to many people don't understand the concept.
For those who don't understand:
When you revert around, either on the tail or nose of your skis, the part of the ski that you have flexed off the ground never touches the ground again until you land the trick.
Example of "not" a butter:
Example of a butter: (the angle doesn't really show the butter well, but it was the best I could find)