explode a bombshell

To reveal something that is very surprising or unexpected. Whoa, you can't just explode a bombshell like that and leave. I need details about this new boyfriend of yours! When we got a tip that the newspaper was about to explode a bombshell about our candidate, we all wondered what information they could possibly have. The CEO's abrupt resignation made sense once the local news exploded a bombshell about him embezzling from the company.