Your car can feel like an oven on a hot day, particularly if you don't park in shaded areas. There's a trick to cooling it down quickly. Roll down one window and open and close the door on the other side five to six times. The hot air escapes through the door you're opening and closing, while the cool air enters through the window on the other side. What's great about this trick is that you're not wasting any gas by blasting the A/C.