Catch Someone with Their Pants Down

To discover someone in an embarrassing situation

Go Bananas

To become very excited, angry, or crazy

Sky Is the Limit

There is no upper limit to what can be achieved

Ball Is in Your Court

It is your turn to take action or make a decision

Don't Judge a Book by Its Cover

Do not judge something by its appearance alone

Strike While the Iron Is Hot

To act at the right moment when circumstances are favorable