San Francisco is hilly. Like, roller coaster hilly. Forget about trying to see the traffic lights five blocks ahead, you might not even be able to see the next traffic light. Getting your car up the hill to the next intersection is an agonizing approximation of the uphill part of a rollercoaster. Adjacent neighborhoods can be on sunny hilltops or fog-filled valleys. A simple drive across town involves so many quick changes in altitude that your ears pop multiple times going up and down all the hills between point A and point B. I'm not kidding. So weird.