Why do they always talk so much in emergency situations

If any friend or relative spoke to me in that manner I’d be on my way out the door mid sentence. No questions just go

これ祖父母が殺されて別の夫婦が祖父母のふりしてたやつだよね。 怖かった。

What movie is this???.

Because the movie would be 12 minutes long if they just hid and called the police. Exposition first, survival second.