I entered a taster Grass Auto Test at the weekend and the Twizy came 2nd out of a heap of other cars, including a couple of almost dedicated grass-trackers. Combination of low weight, good torque and quick Forward/Reverse selection and we were only 0.2s behind the winner. Great fun!
Not sure if this will work, but here it is on YouTube, hopefully.
Twizy Does Grass Track