spring something on somebody

I knew they were getting set to spring something on me today.

Now was the time to spring the big one on them.

His ability to spring free on the fast break will open up the running game.

Despite this good news, he felt that she was about to spring on him.

Does she know about us already or are you planning to spring me on her?

I didn't want to spring my surprise on them until the last possible moment.

The powers shouldn't spring these things on a man so early in the morning.

One day, our professor decided to spring a surprise test on us.

However, I didn't choose to spring it on him today.

I guess there's only one thing to do and that's to spring my last card on the girl.