All my respect to Mr. Burrell.
I hope we all will reach his age with such an humor and joy of life.
The great Rita Levi Montalcini (scientist, Nobel prize, see here: http://en.wikipedia.org/wiki/Rita_Levi-Montalcini
) said "Do not add days to your life, but add life to your days". She managed to do both things, dying at 103 and still following experiments.
(and, well, Mr. Burrell also won the great Milt Hinton who died at 90, and still active)