Q:

Idiom/expression that means "to suddenly tell some news" to someone?

These were the first ones that popped up in my mind (disclaimer: I'm not a native English speaker):

He threw me the news a month ago.
He flung the news at me a month ago.
He dropped the news on me a month ago.

Thy don't appear on Google, so I suspect they are not grammatical or idiomatic. But I'm looking something along the lines. Any suggestions?

A:

I would use 

He sprang the news on me.

spring on
v.
To present or disclose something to someone unexpectedly or suddenly: They sprang the news on all their friends that they were having a baby. The company president sprang on us the plan to lay people off.

A:

He blurted out the news.

Blurt (MW)

to utter abruptly and impulsively

A:

He broke the news to me a month ago.

This is by far the most idiomatic expression for this meaning, and implies a degree of suddenness to the action -- "He told me a month ago" would likely be used if it were not a somewhat abrupt announcement.

