Ahem:
A production of Bat Boy I saw: It was both hilarious and scary, especially the opening, the Act 1 Finale (of course, one of my nearest and dearest friends was playing Ruthie and if you've seen the show, you know what happens to her)
the Beast always scares the crud out of me in any production of Beauty and the Beast I've seen
Caroline or Change: The Bus's entrance is pretty creepy
Chitty Chitty Bang Bang: The Childcatcher. Thank you, Kevin Cahoon, for the chills
Curtains: Oy, the gunshots.
Evita: The funeral sequence
Fiddler on the Roof: (to paraphrase a line from Legally Blonde): Fruma Sarah scares me!!!!!!!!
In The Heights: The blackout sequence
Les Miserables: I was on the edge of my seat during Gavroche's death scene waiting for those gunshots to ring out.
Little Shop of Horrors: All the death and the carnage. Oy.
Mamma Mia!: Under Attack was pretty scary (even Sky in the wedding dress)
Mary Poppins: Temper, Temper was downright creepy
Miss Saigon: The entrance of Thuy's ghost and the evacuation scene. And it was even more scary when I was actually in the show being on the other side of that gate (namely the side that misses the helicopter)
Parade: The trial sequence was so intense. All these people in that courtroom with so much hate directed at this one man and then Where Will You Stand When The Flood Comes and the ending.
Ragtime: When Tateh's running after the train his daughter is on
Spring Awakening: What really scared me (infuriated me, actually) was what a repressive society these people lived in
Sweeney Todd: Well, that goes without saying, doesn't it?
The Light in the Piazza: The hysteria sequence
The Lion King: Too many to count
The Phantom of the Opera: see above
Wicked: When that monkey cage was revealed for the first time, I was so freaked out
Butters, go buy World of Warcraft, install it on your computer, and join the online sensation before we all murder you.
--Cartman: South Park
ATTENTION FANS: I will be played by James Barbour in the upcoming musical, "BroadwayWorld: The Musical."