This truck was searched by border agents after a dog noticed something amiss.
The K9 got a funny whiff of the black GMC Yukon at the San Ysidro Port of Entry on the U.S.-Mexico border.
U.S. Customs and Border Protection agents thought the vehicle's driver was acting out of place.
So they took the driver and the truck to a secondary screening area, where they were able to x-ray the truck using a side-scan mobile x-ray machine.
As the agents lowered the spare tire from underneath the car, I looked back and noticed the suspect's leg shaking wildly.
Agents cut into the tire and found four bricks of marijuana. Just another day at the office for America's border agents.
-- By Eric Marrapodi, CNN Producer