One of the seminal movies of my adolescence, along with
Better Off Dead every movie John Cusack ever made, was Ferris Bueller's Day Off, which has Chicago as it's fourth co-star. And one of the seminal scenes from that movie is the one when the three main characters went up to the top of the Sears Tower and looked down on the city with their foreheads against the glass. It's cheesy, I know, but I still do this in tall buildings. It's a view of the city you seldom get a chance to see, so I tend to take my opportunities to check it out, no matter how dumb I look. Totally worth it.
Maybe that's why this spider chose the outside of the top floor of the John Hancock building to make his home: the view.