What's a paradox/oxymoron in your daily life?

For example, I’ve got a friend who is a certified rescue diver.

So you’d think she be a natural in the water, right? But no, her Australian crawl is really just a badly modified dog paddle.

Strap a SCUBA set to her back and fins on her feet and she’s a veritable shark in the water, though. Very competent and confident.

That’s just crazy to me.