RedactedNarrative: V1 was traveling s/b on e4 canal at the miner rd bridge. V1 was traveling s/b under the bridge. Both the operator and (5) occupants were sitting. Just prior to proceeding under the bridge, at this time (for an unknown reason) occupant/ victim 1 stood up, victim's head struck the north side of cement bridge. V1 continued s/b under the bridge and the victim fell off the stern of v1 into the water. Victim was not seen again until bbfr located him on the bottom of the canal (approx 20 minutes after impact) victim was transported to delray hospital and later succumb to his injuries. ; Victim suffered trauma to head, skin color blue when pulled from water.