I'm not a doctor - so I can't describe flashbacks well - but it is like you're living it again.
Darrell Hammond[flashback] Santino: Whatcha go to college? To get stupid? You're really stupid!
The Godfather: Part IISustained negative flashbacks can stir a heart attack.
From Within I Rise: Spiritual Triumph Over Death and Conscious Encounters with "The Divine Presence"