Dang, I forgot about how much your muscles like to hurt after working out. (Well, at least the first couple weeks after not working out for a long time.)

Today a new runway opened at the airport. I checked it out during lunch... the planes weren't that loud outside and our building is soundproofed.

An hour later, a bunch of large planes came by that sounded fairly loud inside my building. Those were the ones I was trying to see on lunch break! Just now, about two came overhead in two minutes.