Cry my eyes out, that's what I would do. That's a lot of bitcoins to just lose and never get back though.
Unless if I was rich in that situation, I wouldn't worry much about it.
lol even if you are wealthy, as Zuckerberg if he loses 10,000 bitcoin. I would bet that. of course he will be sad, you know 10,000 BTC equal to $ 4,500,000. everyone would be mad and cry !