In an auto shop, 40 years in the future...
Bobby Walrus: Well, here's your problem... Your whole engine's kaput!
Prof. Vanderbil: Well, I knew that much. Can't you fix it?
Bobby Walrus: Ah, don't sweat it. Gonna take a while, though, to find another 2015 model engine in this day and age. They're pretty much obsolete. Sure you don't want to upgrade to something more... modern?
Prof. Vanderbil: Forget it! I'd rather keep my feet and my wheels on solid ground even if it kills me!
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DeanFox
least with all 4 tires on the ground if you run out of gas you coast, in the air you drop.