This photo isn't actually my mum as I was far too embarrassed to take a photo at the time...! Instead this is generously provided via Flickr by Landahlauts.
Aged 15, in a foreign campsite as other campers warmed their baked beans, I was horrified to discover my mum calmly doing Tai Chi under a tree on the top of a hill, in full view of everyone. This reflected very very badly on me and meant that no boy would ever grunt in my direction again. A tragedy.
Of course the reality (sadly only discovered about 5 years later) was that it is extremely cool to have a mum so committed to her health, body and passion that she wasn't worried what anyone else in the campsite thought.
I've not quite made it to that point myself yet, but I'm working on it and look forward to embarrassing my own children as soon as they're old enough.