The idiom "collision course" refers to a situation in which two or more things are moving towards each other, or where two ideas or events are coming together in a head-on manner. It can also mean a situation that is likely to lead to conflict or disagreement.

The idiom "drop a bombshell" refers to making an unexpected or significant announcement that has a profound impact on the listeners, usually causing shock or disbelief. It can also mean revealing confidential information or a surprise attack.

The idiom "all of a sudden" means without warning, unexpectedly, or instantly. It can also mean out of nowhere or from the blue.

"Labour of love" refers to a task or activity that someone does willingly and enthusiastically, without expecting any reward or compensation beyond the satisfaction they get from doing it.

The idiom "keep your nose clean" means to avoid doing anything that might cause trouble or make you unpopular. It is often used to describe someone who is careful not to do the wrong thing, even if it would be easy or tempting.