Would you think this would be a valid and successful lawsuit ?

A friend of mine went for a checkup at the clinic. She needed to use the ladies’ room. She walked in and some kids were spraying each other with water from the faucets which got a lot of water on the floor. She slipped and fell, breaking her kneecap in half and screamed. The nurses raced in and the mother of these kids came in and ushered their children out not saying a word to her. She is in a brace from pelvis to ankle after having a screw put in her knee, pain killers didn’t work and she hasn’t been out of the house for three weeks. Feeling better now, she and her husband went to a lawyer (she got out of the house then, obviously) and he said there was nothing he could do. She had to be able to prove the water was on the floor briefly, just as she walked in and she can’t prove that. Does she need another lawyer or is it “sorry, Charlie; you lose.”