Back in the day, we had a guy try to go thru a drive-thru in his P-6. He thought he could make it under, but the ground was uneven, he got halfway in and got solidly wedged in. Rather than tear the fiberglass roof all to hell trying to back out, he just let enough air out of the tires to lower it an couple of inches and allow him to drive all the way thru without rubbing.