eye-opener

Sending in the Marines certainly was an eye-opener.

She described the 10 days of workshops and events as an "eye-opener", helping to demystify the process of getting published and filling her with confidence as a writer too.

"Pep influenced me a lot. He has an incredible ability to organise the game, to control space and to constantly find new solutions. Watching him train Bayern was an eye-opener. He's one of the greatest thinkers football has ever had," added Barcelona's Flick.

"This week has been a great eye-opener to just when I'm happy and expressive and myself," Raducanu said.

The fact that this was essentially allowed to happen, and that Americans were at greater risk than we could have imagined, is an eye-opener.