Late to the party*.... 2000 Insight kill switch. Momentary button & hose clamps
Falls perfectly beneath my thumb. Er. Go. Nomic!
The GREAT/AWESOME/AMAZING thing about the Insight is: to restart the engine, all you have to do is shift back into gear (or tap the gas pedal... or deplete the brake vacuum reservoir...). The quiet, high voltage motor spins the engine to life in the blink of an eye. Very slick.
(* So late that the car is conditionally sold at the moment.)