Taxi take two

I usually try to travel by bus or walk if possible.  However, I always take taxis to the airport and also when I have an early morning meeting at the office.  Last Thursday I took a taxi from home to the airport for my trip to Perth.  One week later, I had to take a taxi to the office yesterday morning so I could arrive in plenty of time for a client meeting. 
Much to my surprise, when I climbed in the taxi yesterday morning the taxi driver remembered me...
Mr Taxi Driver ~ good morning
me ~ morning, Science Park 1 please
Mr Taxi Driver ~ I remember you
me ~ really??? (said with total skepticism)
Mr Taxi Driver ~ I took you to the airport 
me ~ oh really??? (said with total skepticism)
Mr Taxi Driver ~ how was Perth?
me ~ holy cow, you really did take me to the airport...Perth was great!
There are some 25,000 taxis in Singapore so the odds of being in the same taxi twice are pretty rare.  To be in the same taxi twice within one week is crazy.