No. it’s normal. You should practice this, because in this state you can program your mind easy, reach past lives and etc.
You can experience anything ranging from sounds to thoughtforms, to visions in this state,
I for example in trance state sometimes hear what neighbours are watching on their tv like it is completely in my room and even painful to hear because it sounds so so loud like I would have put my ears on tv speakers, or when somebody in their apartment in my house when they doing something like they are cleaning their apartment or anything, sounds like they are walking just around me, it is that sharp your senses can become in this state.
Your senses are sharp then, and you are accessing your unconsciousness then, this is how we can program it, and explore it, or even go out from body to astral.
But it looks like you did it involuntary, so doing it willingly may take practice.