The unlikely-named Steve Spangler is big in the world of Diet Coke and Mentos explosions – I believe he was doing it before the Eepybird boys – and he managed to persuade the company to spring for a high-speed camera. The result? Mentos in a fizzy drink, filmed rather artfully and at 2,000 frames/second. Nice. Video here.
[hat tip to Paul for the link]