Beetle. Lift the rear seat cushion and pull the battery up by the cables as it dangles through the rusted out hole in the floor.
Honest to god true story. Way back in the day, a friend had a beetle that was really beat. Sagging everywhere, including the rear seat. One night, we were on a bumpy road with two people in the back seat. As we bounced along, we kept hearing a "zzzt...zzzt...zzzt" and the lights would dim as we hit a bump. After a while, we smelled smoke. Turned out bare metal seat frame/springs was shorting across the battery posts. Had a little welder going on. I'll bet that was not terribly uncommon.