no, *i* was the one doing the yo-yo, which is basically using the vertical (up - high or down-low) in a turning situation to cut inside of a plane with a better sustained turn-rate.
a more pure representation would be found in a flat-turning situation on the deck, as the ki and i were also in form of rolling vertical scissors.
a high yo-yo would be when you're diving on an opponent and as he break turns, you go back up while also making a turn, which slows you down, allowing you to drop back in behind the bogey.