Right? It’s such a good idea. But then they didn’t use it anywhere else, and discontinued the Volt (which was full of good ideas like that 
).
It used the horn, so not a lot of additional parts, either. It electronically triggered the horn very quickly and lightly, to make a pleasant sound. Super clever. The Volt was one of those rare cars where a special team comes together within a car company and is given carte blanche to go do whatever they want. Magic happens when companies are brave enough to do this.
