Not only is the San Fernando Valley the setting for all sorts of water-related skulduggery and the epicenter of the adult-film industry, it's the home of the San Fernando Illegal Soap Box Federation! There'll be thrills, spills, and possibly arrests galore when those gravitational hoons hit the hills.

The San Fernando Valley Illegal Soap Box Federation [sfvisb.com]

Related:
Thrills! Spills! The Greater Los Angeles Soap Box Derby [internal]