Rode bike to a gym during Friday rush hour frenzy amid cars, food vendor vans, construction trucks, other bicyclists,.... (all rushing to go home for the weekend). Upon arriving and deciding where to lock the bike, realized I forgot to bring a lock! (I usually don't need lock when commuting to work and like to avoid any unnecessary weight. Kinda knew this would happen to me some day...) Promptly rode back home, going through another rush hour nightmare.