RedactedNarrative: On August 24, 2021 at approximately 1934 hrs, a 1989 black Baja struck a dock in the Santa Rosa Sound and got wedged under it.  The operator stated he was traveling east in the sound and had engine problems. OP1 stated he heard his engine backfire and was concerned of a fire starting. OP1  stated he left the helm of his vessel, with it still in gear, to look for a fire extinguisher to evaluate the engine and ran into a dock. Upon my inspection of the vessel, I observed the vessel was still in the forward gear with the motor turned off.