Some years ago when metal detecting arches had just been introduced, a gentleman in his 60s with a grin on his face went through the detector. Much to the consternation of the young security operative, the thing went nuts with all the lights flashing and hooters blaring... .
Then a senior security chap came over and took the junior one aside...
"That gentleman is no less than the famous Group Captain Douglas Bader", he explained!
Bader thought it was most amusing!