ðeɪ bˈʌst ˈoʊpən ðə dˈoːɹ, bˌʌt dɪskˈʌvɚ ðæt hɪɹˈoʊki hɐz dˌɪsɐpˈɪɹd, ɐpˈæɹəntli hˌævɪŋ lˈɛpt ˈɔf ðə bˈɪldɪŋ.
They bust open the door, but discover that Hiroki has disappeared, apparently having leapt off the building.