What’s the most expensive thing you’ve broken?

The most expensive thing i've broken was a notebook. I wanted to make a manicure and also watch some movie and I spilled the water on the notebook. I also didn't know that I should have turn it off, but I didn't, so it just stoped typing function.
That's why, now I try not to bring any liquids close to my husband's notebook.

So, what’s the most expensive thing you’ve broken?