The latest standalone expansion, Saints Row: Gat out of Hell, further drops any pretense of realism by changing the game setting to the afterlife.
To convey just how weird things get, the developers are parodying Top Gear with a segment they call Gat Gear. Unfortunately, the impressionist mimicking Jeremy Clarkson does a pretty poor job at the host's voice, but the show features a real-life version of the Armchair-a-geddon that's also in the game. The vehicle is a giant, tartan recliner with a minigun sticking out from each arm, and The Stag gets to take it for spin around London. See for yourself.