day before yesterday

Neighbors in D aren't home, and I have my outdoor chairs really close to their front door. There's a bright green iguana over in front of my door, kind of far away, but getting closer. Finally I just get up and go in my house but I can see that he's gone all the way up to the neighbor's door and bumped it with his head. it was like he didn't see it and he was trying to walk through the doorway. He wasn't moving fast like he was upset or mad and he wasn't moving slow like he was in a daze. I thought they had good eyesight but he clearly didn't think I was something he should stay away from or that is stationary door with something he couldn't walk through.