@Aescip: Taking down reinforced concrete, if it was made properly, is really freaking hard! A well-made wall is strong indeed!
ATM: Annoyed. The chain on my bike's been popping off when I've been downshifting on the front gearset, but when riding back from dinner with the family it happened, and the chain managed to jam itself between the front gearset and the frame somehow. Luckily I was nearly home, so it was a short walk, but it's jammed in there but good, and I'm not entirely sure how to get it out. Hmph.