Did I invent the expression 'gallery legs' and why hasn't it taken off?

'Gallery legs' is the feeling you get in your legs when you're standing in front of paintings.

I haven’t got a new blog for you, my apologies, because I spend all my time attempting to (1) finish our Puskas in Australia film; (2) finish my Allan Jeans biography; and (3) read angry tweets from Piers Morgan talking about rain.

I would go to see that in a gallery, and (tenuous segue) I have written a piece long ago about the experience of attending …