For certain I am not in the advertising industry, but I know damn well if you're going to make a commercial advert in front of the Eiffel Tower, you had better get the job done, before the rain comes!

Norwin1 has added a photo to the pool:

As you can see this film crew had taken hours to set up this shot...whilst waiting for twilight and the majority of tourists to leave the area. However, they could not have known that just before they began shooting 'the spot', it was going to rain. And, this wasn't going to be just a light shower - just behind them was a full cloud burst of rain.

Sometimes, I think, you just can't win. Apparently, this was one of those days.