Mopping should be kept minimal

So some guy slipped and fell in Eikestad's Mcdonalds today. And just as another customer, I feel so bad for him. He was fine, but everyone in the store could hear him fall. And all because the lady was mopping the floor as you enter the store. All good and well to keep the restaurant clean and having signs in place, but jeeeeez - there will ALWAYS be customers entering, so keep the cleaning at the entrance minimal. It is lunch time anyway, so the store will be buzzing.