Sweeping a bank of drop targets: Space Shuttle, Meteor, and etc.
I also like the swinging target--a Steve Kordek specialty. My fave em designer.
After that I hafta get more specific:
The lit spinner on Space Mission.
The Ferris Wheel on Cyclone, especially when you've really built up the bonus there. The weird shot, the music... It's just so satisfying.
Also on Cyclone: When you sneak one in after Drac has said "Bleaeah!" but before the target resets. In yer face Drac!
Sorry, don't mean to derail the thread into specific shots...