The idiom "not believe eyes" means to be surprised or shocked by something that one sees with their own eyes, especially if it is unexpected or seems too good to be true. It can also mean to doubt or question what one sees, even if they are present at the scene.

The idiom "back to the wall" means that someone is facing a difficult or challenging situation where they feel helpless or trapped. They may feel like they have no other options or choices left, and their back is against the wall.

The idiom "every man Jack" is a common expression used to describe someone who is ordinary or typical, without any notable distinguishing features. It comes from the historical practice of placing a wooden stake (a "jack") on a piece of wood to mark its end.

The idiom "pay the piper" means to get what you want or need, but pay a price for it. It can also mean that someone else will pay the cost of your actions or decisions.

The idiom "the bigger they are, the harder they fall" is often used to describe how people or things that are powerful or dominant can still fail or experience a setback. The phrase suggests that even those who seem invincible can be brought down by their own weaknesses or mistakes.