In message , michael adams
writes

"Tim Lamb" wrote in message
.. .
OK. So how many of you can stand on one leg with your eyes shut for
more than 5
seconds?

According to "Trust Me I'm a Doctor" 1999 edition p.143
this is fairly age specific

age
20 30 seconds
40 15 seconds
60 5 seconds

I think I can guess the answer for 70:-(
--
Tim Lamb