I got a flat on my 95 850glt. I ran over screw. I was close to home so I drove the two blocks home on the rim-very slowly. It had been raining, and my parking spot is mud. I had to be somwhere, adn didnt have time to get it plugged, so I pulled out the sissor jack, never used it before, so I had to look at the manual. I was impatient, so I looked quickly underneath to find the spot where the jack latches onto the car. I mistakenly put it into another opening were the screw is. It must have been close to the real latching point, because after I jacked it up a little, it shifted violently to the front, then suddenly stopped- the jack had slid into the right latch about a half inch away. I really avoided a mess. By the way, I drove with the donut 80 miles to and from my destination that night--That little Volvo donut spare was tough!