Peak mule

A farmer in Tennessee has resorted to using a pair of mules to pull a tractor rake to harvest hay.

T.R. Raymond says the mules are slower than a petroleum-powered tractor, but there are benefits.

"This fuel's so high, you can't afford it," he said. "We can feed these mules cheaper than we can buy fuel. That's the truth."

There's also video of the modified equipment, buy you'll have to sit through an ad and a talking head.