1. He ran away from home on a mad impulse.2. A runaway child successfully boarded an airplane without anyone knowing.3. He had an emotional breakdown and ran away from home.
 run away from home leave home (adjective) (noun) runawayrun away from home 指沒事先告知的離家出走, 譬如說跟父母賭氣就離家出走. leave home 單純指離開家裡. runaway 指離家的人He had an emotional breakdown and ran away from home = 他精神崩潰，離家出走
Team A's defeat over Team B is considered the biggest undrdog victory in basketball history.