RedactedNarrative: Vessel 1 was trolling at a slow-no-wake speed under Buchanan Rd thru a small culvert on the north side of East Canadian Lake. The vessel was about to hit the culvert and the injured put her arm out to try to prevent the vessel from hitting the culvert. The injured person's arm got stuck between the vessel and the culvert. The vessel continued thru to the north side and stopped at the witnesses residence to have an ambulance called.