Wikipedia defines this as,
An out-of-body experience (OBE or sometimes OOBE) is an experience that typically involves a sensation of floating outside one's body and, in some cases, perceiving one's physical body from a place outside one's body.
There are numerous studies on people having this type of experience, and I remember Ven. Yuttadhammo once said he also experienced this when he was young.
I think interpretations like astral body projection do not quite adhere with Buddhism.
Are there possible explanations on this from the Buddhist perspective with regards to Five Aggregates?