I'm a little more charitable. Hockey is a high speed game of mistakes with high chaos and randomness. Ceci reaction time is like a second from 'oh shit broken stick' to reacting to it. His reaction followed his brain which was directing a safe, controlled cross ice pass to d-partner. Stick breaks, opposing forward closing, and impulse and reflex takes over. Bad break following a dumb luck puck off Nurse's foot. The game's always easier and slower from our cozy vantage points.
Ceci played a pretty solid game including amping up some physicality.
Upside is this bad luck happened winding down a dominant win. Perhaps Ceci (and fellow defenders) check their sticks next time they are in a critical moment situation and mitigate one area of risk.