He Did It
When Dave says the sign needs to be changed, the sign will be changed. What did it say before? Who knows, and who cares? Dave asked for the sign to change, so his loyal employee did so. That's all anyone needs to know.
Don't Be Afraid
This employee's manager yelled at them for not using enough wet floor signs while mopping. So, the employee took every single one they had in the store and made sure to put them all out at the same time. No one will be slipping on this employee's watch!