While a passenger was riding in the company-owned Lincoln Navigator, the front passenger seat belt suddenly tightened with significant force without a collision or other apparent triggering event. The seat belt remained extremely tight against the passenger and caused visible bruising. We later became aware that Ford has issued safety recalls involving inadvertent deployment of the seat belt retractor pretensioners on certain Lincoln Navigator vehicles. We are reporting this incident as a suspected seat belt pretensioner/retractor malfunction and are requesting that it be documented and investigated.