I recall seeing a humorous thread on one of the Jeep forums about meeting up by JC Penney to air-down the tires and then do some extreme off-road action (rolling up on those concrete blocks in front of parking spaces) in front of the food court entrance. There should be a magazine for such things for the sole purpose of mocking these guys. :-)
He could probably offset grind the crank for another 7cc. It might hang with <150cc scooters with related modifications. A 250 shot of "NOS" (a term that I loathe) could be thrown in for good measure.
I've been musing about doing similar things for years. Mine would have an ironing board or picnic table bolted to the decklid and a mailbox strapped to the hood. The 1/4" plywood body kit (attached with deck screws, of course) would really set it off. Several cans of yellow Krylon would add more power than any reasonable person could ever use. 8)