Who around here knows how to translate gang tattoos? The heart seems particularly suspicious.
Shoot, that's easy. He's the one in the Range Rover, right? That identifies him as a serious ecologically concerned environmentalist. The tats signify his particular concerns over the fate of the Spotted Owl and that m'eff'er in the gas guzzling Maserati clearly had a more cavalier attitude regarding said creature and deserved anything that befell him.
Eye-heart-owl, not just a philosophy, it's a call to action!
rotflol
D'oh! Well now it makes sense why the "green" taxi necessarily exploded... it was a martyr for the cause.
Brilliant!