I had a very "Doctor Who" moment today at some empty tennis courts, which were covered in puddles and leftover snow.
The sun was setting, and there was barely a cloud in the sky, creating a very large, very diffuse light source. This gave me crystal clear reflections in the puddles of snow melt on the court.
I felt like I was peeking into some kind of parallel universe. A wide aperture created the diffuse glow of the edges of the puddles, which heightened the unreality of the scene.
Canon 5D Mark II
135mm - ISO 500