A vehicle occupant protection expandable bladder may comprise an initial expandable chamber, an occupant restraining expandable chamber and a releasable connection that is configured to connect the occupant restraining expandable chamber to the initial expandable chamber or to a vehicle. The vehicle occupant protection expandable bladder may be configured to be expanded from a stowed state to a deployed state in a vehicle. The deployed state may comprise a first phase in which gas flow from the initial expandable chamber to the occupant restraining expandable chamber is at least substantially restricted and a second phase in which gas flow from the initial expandable chamber to the occupant restraining chamber is unrestricted. The releasable connection may be configured to release the connection in the deployed state.