Why do those fat-ass pickup trucks gunning around town need to be as loud as helicopters? In the cases of those who compete in the Truck and Tractor Pull, it’s because they actually are helicopters—under the hood, anyway. Though easy to resent on suburban streets, these blaring engines and plumes of black smoke hark back to Napa’s agricultural roots. Before flatscreen TVs, Italian-villa wineries and Michelin star restaurants, Napans gathered with their neighbors to entertain themselves the old-fashioned way: by revving the shit out of souped-up farm equipment. Bring your earplugs on Saturday, June 30, to the Napa Valley Expo Fairgrounds. 575 Third St., Napa. $16–$20. 5pm. 707.224.5403.