Right on the Jackal. That was the first one built.
I think those pictures came from the "2003 Anti-Gravity Races" held in the Marin Headlands, just north of the Golden Gate Bridge.
Here are a few more pictures from that event:

- e-volt.JPG (199.51 KiB) Viewed 1717 times
Mike Mercado's custom Etek cruiser:

- 's.JPG (190.85 KiB) Viewed 1703 times
Deadly Etek powered ESW standup scooter:

- SF ev hillclimb5_800x600.jpg (110.21 KiB) Viewed 1717 times