- Giles: “Uh, the boy's been in a coma for week. How can this be possible?”
- Buffy: “What, am I knowledge girl now? Explanations are your terrain.”
- Giles: “Uh, well, um, there's astral projection, uh, the theory that while one sleeps one has another body, a-an astral body, which can travel through time and space.”
- — Buffy Summers and Rupert Giles[src]
Astral Projection was a process wherein the consciousness of being who's in a state of slumber or comatose, left their body, into an "astral body" where they could travel into the real world or in different planes of existence, throughout time and space.
- In Sunnydale 1997, Billy Palmer manifested as an astral body after he was beaten into a coma. Along with his consciousness, the nightmares of the people of Sunnydale manifested in reality.
- In Los Angeles 2003, after dosing herself and Angelus with the mystical drug known as orpheus, Faith Lehane and the said vampire entered a mystical walk in Angel's mind, witnessing past events in his life. During these trials, they were unable to interact with any of the scenery and this period took a close when Angelus began to fight Angel, cumulating to the point Angel's soul was restored.
- A year later, the comatose Cordelia Chase became an astral body and used her last day on earth to assist Angel and his team in preventing Wolfram & Hart's failsafe being released by Lindsey McDonald. This time, Cordelia's astral body could interact with the world but confirmed dead after her time was up.
- After the destruction of Sunnydale, Willow Rosenberg traveled to the Himalayas via astral projection. Since she was on a different plane, she could not return to L.A. to help Winifred Burkle who was dying.
- When Amy Madison placed a magical curse on Buffy Summers whilst she was sleeping, preventing her from awakening until she was kissed by someone who loved her, Buffy astral projected into her dreamspace, consisting of all her thoughts, feelings, memories and dreams where she was guided by Ethan Rayne.