rush hour

adrenaline rush

An event or activity which causes such a state.

amateur hour

A situation or activity in which the participants show a lack of skill, sound judgment, or professionalism.

bum rush

A storming into an establishment.

bum's rush

The forcible ejection of someone, such as a bum or a hobo, from an establishment.

eleventh-hour

Just before the moment that it is too late; in the nick of time; last-minute.

finest hour

A point in time or a relatively brief period of time when an especially distinguished, admirable, or effective set of actions is performed.

long hour

Any of the late hours of the day, especially those nearing midnight, or the hours after sunset.

rush in

To act quickly and without due thought