At school, Iggy was told that chicks dig heavy machinery. Realizing that Heathcliff's girlfriend was a total prude, Iggy decided to do whatever it took to get Heathcliff some chicks, thusly renting out a steam shovel with Mr. Nutmeg's credit card.

Iggy isn't very witty though, because "big penis" is meant by "big machinery," which is terrible, because it doesn't take into account all of the women who don't like penis, or, better yet, prefer those that are built for comfort rather than impalement.

Mr. Nutmeg is just surprised that the thing moves. The tracks appear to be wound around a big rectangle with some circles bolted to it.