Baby fell

So last night my SO put our baby on the couch so he could take his coat off. She started to lean forward so I said to put her on floor. He picked her up & then sat her back down on the couch. I was in the bathroom & heard him yell “oh shit.” , a thud & crying. My seven month old leaned forward, & flipped onto the floor. She is okay but I am so mad. He kept saying “it’s no big deal, she’s fine, she didn’t really fall that far.” He’s acting like it was nbd.. but he didn’t listen to me. 🙁 I’m so upset