It was low tide. I needed to navigate shallow water to get to my usual tie up spot. I did what I frequently do in this situation, turning around to lift the idling motor into the shallow water setting. The new motor we bought this year doesn’t raise and lower quite as easily as our old one did, so I had to jiggle the motor to get it to lock into position. As I did this, the motor tiller brushed the side of the dinghy and jerked into full throttle. The dinghy surged forward, then swerved violently to starboard. I was thrown from the dinghy into the shallow water.