An inertial blocking member subassembly comprising: an inertial blocking member associated with a release handle assembly framework, the blocking member having a center of gravity offset from an axis of rotation, and the blocking member being rotationally and translationally movable between an at-rest position, in which the blocking member does not prevent actuation of the release handle, and an engaged position, in which the blocking member prevents actuation of a release handle. A biasing element biases the blocking member into the engaged position. As a result of an acceleration force acting on the blocking member center of gravity, the blocking member is rotationally and translationally moved from the at-rest position to the engaged position, and in which engaged position the blocking member is retained by a blocking member retainer until disengagement of the blocking member retainer from one of the release handle assembly framework and the blocking member.