From AMLopedia
The Ghettomobile was a transportation device that Adam made one day while he was bored. He took a table, turned it upside-down, and glued skateboarding trucks and wheels to it, making a giant skateboard. On the backside, he painted "^__^ KEKEKEKE", "LOL FYAD", "GHETTOMOBILE", "Y3K", and "AML"
Marcus was the best at it because he could ollie when riding it down the hill. Footage of the test run was shot and appeared in AML: Hardcore Revolution.