I was photographing some birds recently when I noticed a reflection on the back yard fence I hadn't seen before. It took a minute for me to realize what was being reflected on the fence was the glass from the front door. I live in a raised ranch home and the front door is on the lower level. The backyard is situated higher than the front. The reflection was coming from the front door, through the house, and out the back window in the kitchen onto the fence. In all the time I've lived here, I've never seen it and I'm pretty sure I wouldn't miss it. Just looking at it from point A to point B, it doesn't seem possible, but I guess all the factors were in play at just the right time.
This is a shot of the front door from inside showing the actual glass pane that was being reflected on the back fence.