Knock and smoke

well I pulled the head off.. found a piston that was side ways in the block with part of the cylinder wall missing.. not sure what happen... maybe rod bolt didn't get tighten? I I don't know what would cause it.. the piston is stuck in the cyl so I couldn't do anymore research. Here are a few videos of what I found.. Also my heads looked good.. I see where the piston might have kissed the valve though.. not sure if it damaged it or not... the valve is not seated all the way down now.. very small gap.