Minesweeper

Been playing this game quite frequently for the past few weeks. My best times are as below

Beginner : 4 seconds
Intermediate : 37 seconds
Expert : 149 seconds

I search on the web and found out that the world record times are half of my time (in the case of expert, it was like one-third of mine). I wonder how these people can think and click so fast. Not human :P