An ADP spokesman said the company's ABS holdings account for a number in the low-single-digit percentage of its investment portfolio.

WSJ: Google Googles 'Higher Yield,' Finds Auto Bonds

But the real appeal of their adventure lies not in the danger of shoot-outs, hold-ups (or Brad Pitt's abs), but in that unique bond that can only be forged on the open road.

BBC: The allure of the open Texas road

And much to my surprise, it's not my abs, triceps or quads.

CNN: Work out what matters most: Your mind