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Yes.

Look at the front of the bus; you can see some towing cables attached to it.

That's just the MUNI track.

Look again (the GP is correct).

No, it's actually stuck. http://sfcitizen.com/blog/2012/06/10/noe-valleys-23rd-street...

ahhh. cool! (?)

In some areas, yes. SF's Filbert and 22nd St make the top 10 steepest streets in the states:

http://www.fixr.com/infographics/top-10-US-steepest-streets....

If you get the opportunity... No, scratch that... Make the opportunity to visit San Francisco some time. It's a beautiful city within a short drive of some incredible parts of the West Coast of the US.