Pyrotechnically activated hook for seatbelt assembly

A vehicle comprising:

• a vehicle seat having a first side and a second side spaced cross-seat from the first side;
• a seatbelt buckle fixed to the first side of the vehicle seat;
• a seatbelt assembly including a latch plate and a webbing, the latch plate being engageable with the seatbelt buckle;
• the webbing including a lap portion defined by the latch plate when the latch plate is engaged with the seatbelt buckle;
• a hook retractably supported by the second side of the vehicle seat, the hook being retractable relative to the vehicle seat from a first position to a retracted position and the hook being engageable with the lap portion of the webbing as the hook retracts from the first position to the retracted position;
• a lock including a pin and a spring biasing the pin toward the hook, the pin being engageable with the hook when the hook is in the first position and the retracted position;
• and
• a pyrotechnic device operatively coupled to the lock to disengage the pin from the hook when the hook is in the first position.