Have any of you had to use your floor jack while not on a paved surface? Years ago I remember my father trying to use one a gravel should and he said the boat axle kept slipping off the jack because a floor jack needs to be able to roll towards the lifting point as it goes up. If the jack can’t roll the lift point rotates and can slip out from under the axle. He quit carrying a floor jack after that.
I didn’t witness it but that’s what he told me.
A bottle jack or scissor jack goes straight up but a floor jack goes up in an arc if it can’t roll across the floor.