Does anyone actually ever yell out, TAXI!
I think it only happens in the movies. I know for sure that the only time they ever stop when called or hailed is in the movies. In the real world things are so different now. I have my Yellow Cabs app installed on my Android phone. It knows where I am and I can order a taxi online and graphically select my destination in Google Maps. This works especially well when I need to go somewhere I've never posted a letter to!
So I've order my Taxi and now I can sit back and see on the screen where it is and how much long I have to wait. No more yelling out TAXI, for me!
Photo: Robert Rath, '366 Days of 2012, Day 328 - Taxi'. 1/20 f/2.8 ISO1600 70mm