One of my favorite moments in life is when someone is confidently telling you something cannot be done, but you’ve already done it.
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And the discussion about this cause this somebody will still not believe you when you tell you've done it.
LOL
Imagine that
Nothing like it 
Like traveling out of the country?
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Is that a Ben Bernanke quote from 2007?
For decades/centuries, it was widely believed that breaking the 4 minute mile barrier was impossible.
Then, on May 6, 1954, Roger Barrister ran a mile in 3:59.4.
Within a few months of Barrister proving it was possible, several other people also broke the 4 minute mile barrier.