Older Than the Beatles

A professor of psychology at a British university included a lecture on
crowd psychology in his annual course. To illustrate mass hysteria, he
regularly showed TV news footage of teenage crowds greeting the Beatles
at the local airport in the 1960's.

One year, when he ran the footage, he heard squeals and bursts of
laughter from his students. When the film ended he asked what had caused
the hilarity.

Replied one student, "we recognized some of our parents!"