@BigSwole those are some good pics of "casting off" a hi-lift - assuming that their plan is to push it over to one side or the other.
I can't see the foot they are using, I've seen some damage to the jack when the standard foot is used because of the rotation or twist in the jack in relation to the foot.
I have always used the Masdam accessory foot that replaces the original foot to use on hard surfaces. It would sink right in to what they're on there it looks like.
What the OP was thinking about (I think...) is driving off a jack, in other words, in these pics, as soon as they get the rear tires high enough to get over that pesky log, they drive forward (lockers) and that gets them out of trouble.
If I can imagine that, the jack would be pushed in to the rear bumper of the Jeep and damage it considerably.
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Not to Monday morning quarterback it, (it is Monday morning :) ), another option would be to stack rocks under the tire to get the Jeep high enough to clear the log.
But in that case, I would use the wheel lift accessory to eliminate the suspension droop.
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Dan.