1. There were lines out the metro station. My sister had to stand in one for an hour and a half just to buy a pass. We had bought ours in advance, but we still sat in the station, watching train after train go by, jammed full of the Sane. The Metro conductor told us that for these large rallies, the organizers have to pay the metro system to put extra trains on the line. It was clear to all of us that no such forethought was employed, as five or six trains passed us before we got the idea we should take the train back to the end of the line, and then we'd actually be on said train when it turned around and headed back.
2. More evidence they had no idea how many people were going to show up: the extra speakers and the jumbotrons only made it to about 1/3 of the way back from the stage; the last of the dense part of the crowd was back at the Natural History Museum, unable to hear much but a few snatches of music, and indistinct yelling. 4 blocks from the stage on 7th St. I could hear Cat Stevens, and even a few minutes of John and Steven bickering. We decided by 2 pm that we'd just have to watch the stage events when we got home. I still haven't seen the whole thing.
3.It seemed like a terrible waste of potential that so many Americans drove/flew here from as far away as California, all pretty much in agreement that we'd like to see more tolerance, more dialog and more cooperation in government, without any power to do anything about it except just to be there. It may be that's the only way we would all have shown up, but I think I secretly wanted a 4th party to arise from the Mall. It didn't.
4. It was too damn short. Woodstock went on for days. DAYS.
5. Even though a large number of the rational folks bused in and out, there were such mobs at the entry to every restaurant in walking distance, and back into the train stations, that the wait to either eat or get on a train was between one and two hours. So we stood in the shortest line, which happened to be a salad place called Chop't, and half an hour later we were eating chopped salad. So very filling, so classically Washington. Hunger does weird things to people. There's a Chop't across the street from us in NYC, that's been there for 7 years, and we've never bothered to go in there.