Here is something funny you won't find in guidebooks.
My husband and I were driving thru san francisco, heading up from LA on our way to a campground in northern california. Driving up the main drag that goes thru Golden Gate Park and over the GG Bridge.
Well it was a weekend, and traffic was hellish. We got stuck in gridlock, caught in the intersection between lights and of course where you gonna go? So we stayed put and blocked (with our big ass Ford F250 supercab) a fussy couple in Mercedes going th other way.
Well they had a fit and a half. Beeping horn (as if that was going to miraculously make us move--there was no where to go!!!) Screaming. Cussing. You f-ing this you f-ing that.
I calmly pull out my camera. I calmly lean out the window, grinning like a savant at these folks. I whip my camera up to my face and click! snap a pic of them. Well then me and hubby started laughing like loons. They did not know what to do. Light changed. We left.