“A turning point”

“Cut both ways”

To have both positive and negative effects.

“Draw a blank”

To fail to remember or find an answer.

“Fall flat”

To fail to have the intended effect.

“Catch someone off guard”

To surprise someone unexpectedly.

“Close call”

A situation where something bad almost happened.

“Fine line”

A small difference between two things.

“Day in, day out”

Every day, repeatedly.

“Face value”

The obvious or stated value of something.