I did have a jack pop out from underneath an axle once after I removed the tire. Ground was softer than I figured and it let the jack lean. I know some will roll their eyes, but it really wasn't that scary. The other tire on the same side axle supported the camper with minimal issue. The crappiest part was stacking a few pieces of wood under the brake drum while I quickly readjusted the jack for more lift. No, it didn't cause issue to the drum. Now if it had been a single axle trailer ...
