Statistically Significant?

There was once an annual summer conference held at the Royal Statistical Society in London and over 500 eminent statisticians from all around the world were in attendance to hear a major speech on a significant breakthrough in computational algorithms. Mid-way through the afternoon, during one of the key lectures to this loft assembly, one of the statisticians in the audience got up from his chair, walked to the middle of one of gangways, flapped his arms each side of himself very gently, and began to rise up into the air, went right across the top of the room and out through an open window. But no one in the room batted an eyelid - because 1 in 500 is not significant.