One from the archives taken in the early 2000s when I was living a few blocks from the Lake Huron shoreline in Southampton, Ontario.
Taken with a telephoto lens to make the lighthouse large in the frame. As I was down at the shoreline regularly I could time the camera exposure to the flash of the light in the lighthouse. If I recall correctly the light flashed every six seconds. So after it flashed I would count five seconds and then release the shutter before counting six.