What happens when you throw a grapefruit from a vehicle that is traveling 75+ mph. The grapefruit must roll when it hits the ground (as opposed to "splat", in which case you just smashed a grapefruit which any drunken monkey can do. congrats, you fail at life). The centrifugal force from the spinning causes the juice to push on the skin. After a few seconds of rolling the grapefruit will explode. Warning!!! Geting caught preforming the spinning grapefruit of doom has more dire consiquences than preforming a steaming teakettle on a unsuspecting victim. (charge: "launching a missle from a moving vehicle", possable felony)
"Dude, did you see that spinning grapefruit of doom take out that satanic bunny"