My daughter was crying for hours earlier. To the point that I tried everything but nothing was…

My daughter was crying for hours earlier. To the point that I tried everything but nothing was working. I woke her dad up and brought her to bed with him. He looked at her once and told her to knock it off and stop her crying and what would you know she did. Then she went to sleep woke up two hours later and is a totally happy baby now. When I tell her stop or thats enough crying she doesn't listen to me but he tells her once and she just stops. What the heck kind of stuff is that. Crys for hours with me he tells her once and goes to sleep WTF.