Ariels
Ariels are when you throw the knife up in the air by the safe handle then catch it so that the blade is open. The zen rollover is also in this trick, and the same video is also on the zen rollover tutorial page. So, for the ariel, do the first two steps of a simple opening and throw the knife up by the safe handle. wait for the blade to pass and when you see the bite handle come around you lay your hand out under it and then once you feel the knife hit your hand you grasp it after the bite handle touches the safe handle.