You have to understand what really scares me--horror movies such as the Ring don't scare me at all, I laugh, but a television movie about an abusive teenage relationship where the boyfriend kills the girlfriend--terrifying.
This in mind, I think Cabaret hast to be up there as the scariest. The simple fact of how Hal Prince described it in Broadway the American Musical, where people are, terrible things could happen. That's scary.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli