I was staying at the Conrad Miami and it was late about 12-1:30am on Brickell Avenue when I heard the familiar Vroom of a Cayman S. It was white with black wheels. If you are staying in Miami I Highly recommend staying at the Conrad.
Conrad Hotel Miami Florida - Miami Luxury Hotel - Miami, FL Hotels
If this was you let me know!
BTW I stayed there one night B4 going on Royal Caribbeans Freedom of the seas on an Eastern Cruise. Biggest ship in the world, I will post pics soon.