Before going to watch it, Si and I went to the Sadang Outdoor Flea Market, the largest of its kind in Korea:
These dairy cart adjummas are pretty common where there's a lot of foot traffic.
You can get just about anything there, from used electronics, knives, and name-brand cosmetics to knockoff handbags, vintage dresses and decorative antiques. There were also stalls for crafts that kids could do, handmade accessories, soaps, fans, and more, all for low prices.
Later that night, I met up with a number of women I worked with and some of their friends in Jongno to watch the annual lantern parade. Drinking made it pretty entertaining.