There's one sure-fire way of making a normally co-ordinated, sporty kind of grown man look like an uncoordinated fool..
Take him Ice Skating!
My son Jacob's scout group went to "Erina Ice World" Ice Skating yesterday afternoon.. I've never been ice skating before, and I can tell you it really makes you look like an idiot
Half a dozen falls, several of them sprawled out across the ice, flat on my stomach arms outstretched

But in the end i'd got the hang of it and was making my way around ok, getting a bit of speed up.
Was a lot of fun..