Phantom4ever said: "So many from Harold Prince and Maria Bjornson in Phantom: Raoul jumping into the lake, the Phantom disappearing into the chair and leaving his mask behind, the Red Death disappearing into smoke and then running down the stairs a second later. I feel like I am missing some.
Raoul disappearing into the lake got me too! I always wondered what it was and how he could do that. Then I watched a behind the scenes of a Broadway cast member when they were striking the set, and he showed how it works.
Harry Potter and some fun ones too. One that stands out for me is how they made the theater feel like it was shaking as the hands on the clock raced around? Not sure if I'm remembering that accurately.
One of the worst illusions is Javert's death in the new Les Miz. That contraption that holds him is so darn visibly as it rolls downstage to him, then up into his coat, then as it pulls him back upstage. You have to be sitting dead center not to see it."