I can hear a squirrel chirping really loudly.  He climbs the side of my building, and at one of the corners he has discovered that his voice gets amplified as it bounces of the sheer walls.

I think he has forgotten why he was chirping in the first place,  and has begun enjoying the sound of his own voice as it reverberates through the tall and gaunt columns of the adjacent high-rise buildings under construction. It almost seems like he has begun to think himself bigger than he really is.