I know the figure you're talking about. Unfortunately, I don't know it by name. Whenever I don't know something by name, I just pick a name which is adequately descriptive. I'd probably just call this one PP to CPP changes, or something similar.
To Blair: The Whip is a rotational figure. This one is a simple switch back and forth from PP to CPP. The best comparison I can think of to something that might be familiar to you would be American style Rumba 5th Position Breaks (the arm-to-arm version). Of course, 5th position breaks would not be a good name for an Int'l dancer, since they don't have a comparable step with the same name in Int'l Rumba.
Sincerely,
Jonathan Atkinson