Drabble: Horror?

He had studied for years, prepared for months.  He limited his diet to emaciate his body.  He tried different visualizations to free his mind.  One night he imagined his self floating in a reservoir, the water slowly draining through a hole.  He slipped through the hole, and out, and left his body, and was free.

He looked down upon his gently breathing shell on the bed and rejoiced.  He floated up, away, his soul unencumbered, and only when he was satisfied did he return.

But he returned to a state of shock.

He hadn’t planned how to reenter his body.