Astral projection had been the term for what they did once upon a time.

The character used an astral projection to get out of his body.

"So, have you done any more of this astral projection?"

He'd tried such astral projection but hadn't yet figured out how it was done.

I only appear that way by using an advanced form of astral projection.

That had only been residue of their astral projections, this was the real thing.

"That was the first time I experienced it since 1 traveled by astral projection."

Depending of course on how quick you are with your lessons in astral projection.

You can still do an astral projection, I hope!

I read some of your book, the one about astral projection,' he told Uhlander.