Historical clue formulations

• Medium state — 2020-05-16
• You're out of it if you're in it — 2019-10-31
• Music genre at a rave — 2018-09-16
• A witch doctor might be in one — 2018-01-25
• Cataleptic state — 2015-11-15
• Hypnotized state — 2010-11-22
• A dangerous thing to fall into — 2009-01-04
• Spell — 2008-07-25
• Medium condition — 2006-08-12
• Hypnotic state — 2005-08-02
• Hypnotic state — 2003-04-02
• Under state? — 2003-02-09
• Deep thought — 2002-10-20
• Medium condition? — 2001-03-18
• Channeler's state — 2000-10-03
• Séance phenomenon — 1999-10-30
• Somnolent state — 1996-09-01
• Hypnotic spell — 1995-08-29
• Spiritualist's device — 1994-09-25