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No basketball play gets fans going like a rim-rattling slam dunk. There's a reason there's not a 12-foot jumpshot contest at the All Star Game, after all. But there is a slam dunk contest, and it gives the NBA's best jammers the opportunity to really strut their stuff—no pesky opponents or rules to get in the way of a real showstopper. That's why almost all of the NBA's most iconic dunks have taken place at the slam dunk contest. These are the jaw droppers that have been imitated on a thousand playgrounds. These are the crowd-pleasers that have sold millions of shoes. These are the greatest dunks in NBA history.