Sometimes things get destroyed by accident, other times it's done on purpose.
There's a mixture of both in this video.
I can't imagine ruining a million dollar piece of art because I tripped and fell into it though, the guilt would be with me forever.
The one that really intrigues me in this video is the piece by Banksy that was auctioned off and what happened immediately after that. I have been researching it because I'm so intrigued lol.