RedactedNarrative: Operator of vessel #1 stated she was operating the vessel when she got too close to vessel #2.  Her mother (injured) put her hand out on the other boat to prevent the two from colliding. She was unable to stop the momentum of the vessel and her hand got caught between the two causing her thumb to be severed from her hand. No other injuries were reported and no damages to the vessels.
NameOfBodyOfWater: Lake St. Clair
NearestCityTown: Harrison Township