Re: This is normal in every human endeavor.
Pulled a similar trick on the kids of a friend of mine who were visiting. I was living in Paris at the time in a flat with a great view over the city, including of course the Eiffel Tower. At midnight I pointed to the illuminated Eiffel Tower, said 'Out!' in a loud voice and snapped my fingers. The lights on the Eiffel Tower obediently went out. Cue two very impressed young'uns.