The robbers rotate the hostages between various rooms and occasionally insert themselves covertly into the groups, while also taking turns working on an unspecified project involving demolishing the floor in one of the bank's storage rooms.
The robbers rotate the hostages between various rooms. The robbers occasionally insert themselves covertly into the groups, while also taking turns. These turns are working on an unspecified project. This unspecified project is involving demolishing the floor in one of the bank's storage rooms.