Space Travelers(2000)

Original title: スペーストラベラーズ

Three bank robbers, who declare themselves to be Space Travelers, take six persons as hostages when they are surrounded by the police. Among the hostages, there is a terrorist with a hidden bomb. In order to escape, the robbers ask the hostages to pretend to be part of the gang. Surprisingly, the hostages soon enjoy doing so. On that strange day, the bank becomes a tropical paradise...