On Mon, 06 Jun 2011 19:04:57 +0100, Ron Lowe wrote:

Done carefully with wheels chocked it is perfectly safe.

And a brick on the accelerator to spin the axle?

AARG.

I just tried that on the Land Rover, with one front wheel jacked up, and
both rear wheels on the ground.

I just drove it off the jack.

Only with 4WD and the center diff lock engaged. Assuming that there
is a center diff to be locked of course. B-)

--
Cheers
Dave.