TO PAY OR NOT TO PAY?

An incident happened yesterday in a shopping complex that surprisingly has
escalated to some 'hot' debates among my fellow tenants.
Here is the story.
A lady visitor walked into an art gallery with 2 kids in tow. Within few
minutes, BANG! a costly crystal painting came tumbling down onto the floor.
Apparently, it was one of her kids who accidentally knocked against the
painting which was very precariously placed on a stool! As a result from the
fall, 4 pieces of small coloured crystals came off from the high price painting.

See those sparkling white dots, they are crystals pasted onto a painting

Then came the crunch from the sales persons, they told the lady visitor that
she had to pay for her son's negligence meaning she has to buy the painting!
Since according to them, they won't be able to sell off that painting without
those dropped crystals.
And you know what? The cost for that piece of art, an amazingly pricey
RM1400! Mind you that's a freaking high price especially to someone who's
art is uninitiated.
Anyway, the lady visitor refused to pay for something that was not damage
at all except for those loosen crystals which she claimed could be easily
glued back!
But according to one fellow tenant, David who said that the art gallery had
the right legally to ask the visitor to pay for the dropped painting.David gave
an example, that if you were in a supermarket premises,and accidentally you
are hit or injured by a fallen object, you can claim compensation from the said
supermarket. Likewise, the supermarket has the right to hold you responsible
if you were to damage any products or property intentionally or otherwise.
Ah David also got a point there. No?
To pay or not to pay, that's the question.
For me, it's a NO NO. The art gallery people kinda look like desperate hard
pressure selling which I always don't condone.
So what's your view?