What's the dumbest "We think it's a controls issue" thing that you've been blamed for?

I once got blamed for a heating water leak in the ceiling because I shut the boilers off for a few hours earlier in the day and "it caused the pipes to get cold and contract and open up at the joints." During the Summer...

Turns out it was pouring rain outside and there was a roof leak. All the water was running down the heating water pipes.