It's an icky, sticky situation... Look out for ghost goo! Dripping sticky green slime wherever it goes, an "ASG" (that's Averagely Spooky Ghost) is hiding out in Tom's cellar. Why? Because it's being haunted, too — by a much bigger, way badder Incredibly Revolting Ghost ("IRG," for anyone new to ghouls). And the IRG is the kind of ghost that uses its head — as a ginormous bellowing bowling ball, gross! Good thing for Tom his grandma's best friend just happens to be a world-famous ghosthunter... From the Compact Disc edition.