Mr RattyMouse, I'm sure there's plenty of wild eyed youngsters in China worthy of an Afghan Girl moment to flex your FM2 on, but nothing beats having a vision for the unusual and just being there, in the right place at the precisely right moment.
Nothing captures the imagination more than McCurry's shot of the girl with those searing clear eyes. I Googled it before ("Afghan Girl" and follow to NG's "A Life Revealed") and up she comes, hauntingly beautiful as the day he got the pic. There's quite an interesting background on Sharba Gullut (?spellling, the girl's name), an adult now of course with nowhere near the same emotionally-charged face as that 30 years ago. I've never quite seen anything that goes near that pic, not even in this digitally-pervasive, supercharged world. Pity about the pathetic, amateurish and plain silly parodies that splinter the serenity of the initial pic. A great pity.