run for the hills

break into a run

To start running.

common run

Ordinary persons, things, or events.

dry run

A practice or rehearsal; especially, one that goes through all the motions of a physical process but without the raw material or workpiece present.

dummy run

A trial or practice before the real attempt.

gold in them thar hills

An opportunity for something to be profitable and/or beneficial.

good run

Success over an extended period.

head for the hills

To go to a safe place; to seek refuge; to flee.

hit and run

Sexual intercourse followed by a prompt departure; a one-night stand.