My kids have heard this story so often they could tell it better than I, but I'll post it here anyway.
Before I retired I traveled to San Francisco often, usually to consult at UCSF Medical Center. San Francisco is perhaps my favorite city to visit, the restaurants are among the best in the world.
For several years I would rent a car at the airport and drive into town; the hotel I liked to stay at was a half block from Union Square. I found that I usually left it parked for my entire stay, taking taxis or walking wherever I went. Then I belatedly discovered BART, and found that I could get into the city center faster and much cheaper.
One Sunday I flew in, my talk was scheduled for the next morning, and took BART to the Market St. Station, went up to street level, and this greeted my eyes:
Market street was wall-to-wall, or I suppose sidewalk-to-sidewalk, with no break in sight. I had to cross to get to my hotel, so I joined the fray, me and my roll-aboard, wearing a suit. As I tried to angle across, I was handed a bloody mary, given a paper hat, and merrily walked along. It was like getting into a river and attempting to cross against the current, except a lot more fun.
4 blocks and several minutes later I emerged, now carrying a balloon in addition. It was great fun, a 'pause for the cause', as we used to say.