Highrise Zoom Burst at Night

I love photographing at night and playing with light by using long exposures. In this photo, I found a highrise with an interesting foreground and took a 25 second exposure in three stages - 10 seconds at 10mm, 5 seconds of zooming, and 10 seconds at 20mm. The result is an interesting photo where the zoomed building is superimposed over the super wide angle shot of the same building.