The Gateway Process is a 1983 report about using a series of exercises to produce states of expanded human consciousness such as astral projection, outer body experiments, and other altered states of mind. This sounds crazy, even to me, it kinda reminds me of the Area 51 theories about alien experiments but the CIA decided to share this information.
The CIA Believes in the Paranormal? – Lunch Ticket
How to Escape the Confines of Time and Space According to the CIA (vice.com)
GATEWAY INTERMEDIATE WORKBOOK – MONROE INSTITUTE OF APPLIED SCIENCES (cia.gov)
ANALYSIS AND ASSESSMENT OF GATEWAY PROCESS (cia.gov)