Supernatural stuffs i experience 👽

So it was around 11:00pm at night me my 2 cousins and her bf decided to walk near my school we were walking around it was cold since this was around December when we reach my school my cousins bf saw a building with a floor that has the classrooms lights on but me and my cousins just saw a hallway with the light open my cousins bf saw a human shaped creature like it's an teacher but he can't identify tha face we are so curios in what he saw, until now we still don't know what my cousins bf saw.