For this achievement you need to lick the bolder found at the top of the hill next to the barbecue. If you need more help finding that check out the guide for the boulder of death achievement. When you have the bolder licked you need to take it to the middle of the crop field where you will find a man doing constant donuts with his car. Drag the boulder into the cars path causing the car to explode but your achievement will now pop as well.
If you need more guidance I have included my video guide for this below.