To capture the colourful lights bouncing off the wet floor. Waited for somebody to walk past to add some interest to the picture.
This is the caption for the pic on my flickr site: -
"A reveller makes her way to Boat Quay on a rain-strewn night. Once a busy port on the bank of the Singapore River, Boat Quay is now home to various pubs, bars and restaurants adorned with a myriad of colourful neon signages."