Queens Day -- a celebration of Queen Beatrix's official birthday -- features what may be the world's largest flea market/street party/carnival. Dam Square, at the heart of the city, is turned into an amusement park featuring a giant Ferris Wheel and a terrifying experience called "The Booster". I use a frozen moment in time to link these two rides as they move through space together. At 1/640th of a second, I able to stop both in their tracks. Yet I wanted more than that -- I wanted the masochists flying through the air on the "Booster" to seem as if they were suspended in air only inches from the Ferris Wheel. The tiny space between them would create a spot of tension as the focal point of my picture. Easier said than done. Compact digital cameras -- even the best of them -- suffer from a malady known as "shutter lag". You must first focus and expose by pressing the shutter button halfway down, and then squeeze it the rest of the way the instant before the instant you want to capture. I must have shot this picture at least ten times before I was able to get my timing right. Fortunately, digital "film" is free forever.