RedactedNarrative: Vessel #1 was traveling downstream on the East Branch of the Penobscot River.  They approached the Mic Lic rips portion of the river, and the middle of the canoe became stuck on a rock, and the canoe turned sideways in the river.  Both occupants of the canoe fell out of the canoe on the upstream side. Operator A injured his leg and back area when he stuck the bottom of the river after falling out.  Passenger B was not injured.