Quoted from Monk:Just wait until that ball is sitting on top of the drop targets when they reset. I get it often on my GOT.
The best one I've seen is if a ball is on top of one of the Trolls when it pops up on MM. I learned to not play test MM very long without the glass on, it really launches that sucker. The Hobbit is probably even worse since it has all those pop-ups.