(idiomatic, especially US) Alternative form of have another think coming

Without considering or being affected by external factors.

From one event, a series of insignificant steps resulted in another event.

Alternative form of there's no such thing as a free lunch

(informal, humorous) Frightening imagined creatures; ghosts or other supernatural beings.

Alternative form of chance'd be a fine thing

Something enjoyable or beneficial which, nevertheless, becomes bothersome or harmful in large quantities or over an extended period of time.

(idiomatic, colloquial) suddenly, out of the blue.

(idiomatic) Something not wanted by someone, who is already burdened.

(an expression of) the doctrine that all knowledge is subjective, being derived from observations made by humans, and there can be no objective truth