Trevor is already one crazy dude in Grand Theft Auto V. He really gave a sharp and wild tinge to proceedings in the game, and while he can be a little on the nose, I think there is actually a fair amount of depth to his character.
And hey, why not take this to its logical conclusion.
Here is the unhinged hillbilly as the Clown Prince of Crime, the Joker, in game. Using Ms7mido's GTA 5 Joker mod and Play'n'Roll's tuxedo mod you too can have fun raining chaos down onto Los Santos. Here is a video made in the PC Versions's director mode of the madness in action.
Thanks to Twinfinite for the heads up. I might well get into experimenting with this soon.