hinunterstürzen bedeutet auf Englisch

tumble [tumbled, tumbling, tumbles]▼◼◼◼verb
[UK: ˈtʌm.bl̩] [US: ˈtʌm.bl̩]

crash down▼verb
[UK: kræʃ daʊn] [US: ˈkræʃ ˈdaʊn]

gulp down▼verb
[UK: ɡʌlp daʊn] [US: ˈɡəlp ˈdaʊn]

hurl oneself off▼verb

hurtle downstairs▼verb

tumble down▼verb
[UK: ˈtʌm.bl̩ daʊn] [US: ˈtʌm.bl̩ ˈdaʊn]