Confused animals. Also, the mirror would cause shading on whatever part of the Earth they passed over, which all things considered is probably a good thing. (

Confused animals. Also, the mirror would cause shading on whatever part of the Earth they passed over, which all things considered is probably a good thing. (If the mirror is big enough and close enough, some people might get to see a full eclipse.) There'd be local heating in the target city though, which could be good or bad. If the mirror is only used in the winter, it could be a net positive and reduce icy road conditions and heating bills somewhat.