[Mikendebbie]

I agree with DadsHemi.
I hooked one of my rear curb-side jacks on a "higher than normal" concrete curb while I was turning in to a Cracker Barrel 3 years ago...when I had to swerve sharper than intended to miss the jerk in a little red truck that came into my wide-swing-out path going lickety split.

As you can see from the pic below - the jack itself was not damaged.
The steel brackets at the frame and the foot pad were bent.
I removed the jack (removed from the brackets and used bungee cords to hold it up) and I started hammering/beating the bracket back close to plumb with a short handle sledge hammer.
I also hammered the pad back to "pretty flat"...not flat enough for DW however (she reminds me that she does not like the slightly bent pad on a fairly regular basis!).

Now - 3 years later...the thing still works properly...no leaks...no problems.

I have since raised all four of my rear jacks by one hole to get a bit more clearance.