When the dinosaurs are gone, and the speeds come down, I'll be ready.

But speed comes in a very respectable second, killing 13,000 Americans annually.

Here was where the skill and speed of the partners came in.

"To go down the mountain and feel you have control - carving, feeling speed coming out of every turn."

A speed of 300 knots comes to about five miles a minute.

"My speed is coming back to where I want it to be, but it's not quite there yet," he said.

In this case speed comes with a price: battery life and cost.

But with that speed comes a great reliance on the judgment of the Iraqis.

In the end, the average driving speed over nearly three hours came to 9.6 miles an hour.

However, such speed and power do not come without some minor secondary effects.