Weird gush feeling?

My husband and I were having sex and we usually use the pull out method. He told me he was going to cum soon and I felt a gush of something from him, inside of me. I thought he didn't pull out and came but a minute after that, he pulled out and like 3o seconds after that he came. What I was feeling before, what could have that been? Excuse me if I sound dumb. It was just so weird.