"All together now-for fun ... and science"

Recently around august I came across this very interesting article about 1500 of Punggol Secondary School's students, teachers and parents, under the eye of A*Star, NTU and the Singapore Science Centre attempting to get into the Singapore Book of Records for the "Most number of famous Cola-Mentos Geysers created at once." It was an act done part of the school's National Day celebrations and this year's Singapore Science Festival.
After I read the interesting and cool but thought-provoking article, I began to think, "How does this thing work actually and why is it so famous with large numbers of people experimenting this "Chemical Trick". And then, I wanted to find out how this whole thing actually worked.
This is actually a reaction of Diet Coke and mint Mentos candies. Diet cokes are usually the preferred choice as it tends to react better. By dropping some Mentos into bottle of Diet Coke causes the Diet Coke to foam at a rapid rate and spew into the air. Mint-flavored Mentos are also the preferred choice of mints to use, as fruit-flavored mentos have a smooth coating which slows down the reaction. Because of the spectacular nature of this physical and chemical reaction and the easy availability of the recipe, the chemical reaction which causes the eruption is a popular subject for several Internet videos which can also be found on websites and mostly on YouTube. The bigger the bottle of Diet Coke, the bigger the spectacular explosion.
After this trick was created, it gained lots of support from around the world and eventually led to several videos on demonstrations for cola geysers, tv shows about it, guinness world records of the reaction explosion height and number of simultaneous explosions, and even competitions!!!
This is the reason behind the chemical reaction: The physical structure of the Mentos is the most significant cause of the eruption due to nucleation. The surface of the mint Mentos is littered with many small holes, allowing CO2 bubbles to form very rapidly and in great quantity, in turn causing the jet of foam.