I wondered about Wobble Trap until it was explained on that video posted on another thread. See episode 71 http://www.powerfactorshow.com/
At the end it explains that wobble trap, also known as continental trap is bery much like American Trap with a few differendes.
1. The tagets are faster (don't recall how much)
2. The angles are sharper (don't recall)
3. Besides oscillating to the left and right, the machine also oscillates to throw targets higher and lower (this seems to be the big difference to me but I have yet to try it.)
4. You are permitted to take a second shot to hit a target.