start diving, 28 years old

[Byron]

28 is ten more than 18 but you are at your physical peak and Pete Waterfield has only just retired in his thirties. There was much nervousness amongst the celeb. participants in TD's Splash tv show - many well beyond 28 - but nevertheless expressing their exhiliration when getting their first dive right after coaching.
A bit like snow skiing I guess - you topple over day after day to begin with and then suddenly realise you have completed a run without a fall.