The first time I felt the split of the astral and physical bodies was while using the mantra FaRaOn. I learned it from Belsebuub’s course on astral projection.
I got into a very relaxed state on the verge of falling asleep, but with my mind awake, chanting the mantra mentally. Then I started feeling my legs floating in the air and my arms swinging around, but was stuck in my torso and could not fully get up in the astral.
Eventually, I was able to experience a full, but brief astral projection.
I felt my astral body separating from my physical one and found myself standing in my bedroom. I looked at the bedroom door, and then flew through the door very fast. Unfortunately, not being used to the sensation of passing through the solid objects in the astral plane, I woke up as soon as I hit the door.
Nevertheless, it was my first real success after many years of trying and failing, and even though it was not as spectacular as I had maybe imagined, it was something I had accomplished and was able to repeat again and again, with more success.