i've done what slabquest did with the freeway scenario many times but I trow a little different spin on it......I don't look for a semi to pull up behind, they aren't always handy when the inspiration occurs. I usually just make sure said partner is asleep then I simultaneously slam the brakes, lay on the horn and yell "holy s--t!"

This has almost produced fist fights, lost partners and other retaliation but the wild-eyed look on their faces as they hit their heads on the roof is worth it. I laughed so hard once I almost DID drive off the road. Most of my partners don't fall asleep in the truck any more.