Ghost Bomb ☑
Some of the first advice I got when visiting SF was "never go into Golden Gate Park at night", but if you're looking to give this beginner a hill a little more spice, hit it in the darkness.
Every single night people camp in the Golden Gate Park woods, so be aware of that. The lack of light is another issue. A headlamp or flashlight and a crew and you should be all good. A full moon would also help with visibility. The parks department does a pretty good job of keeping the road swept, but if the winds are up, there will be debris.