On the Gutter. On The Gutter is a gap that is unlockable on the level New Jersey in Tony Hawk's Underground. WalkthroughEdit The player must grind any gutter on Elm Street, you must stay grind a gutter for at least one second. Method to unlock On the Gutter. Retrieved from "https://tonyhawkgames.fandom.com/wiki/On_the_Gutter?oldid=5087" Categories: New Jersey gaps Tony Hawk's Underground gaps Gaps Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.