An experience or set of experiences which is intellectually challenging or stimulating.
An ego trip.
A disorienting, exciting experience, especially one consisting mainly of striking sensory impressions.
A state of mind in which one is distracted, disturbed, or unnerved, whether self-induced or resulting from ill-treatment by others.
Any bad, miserable, difficult or terrifying situation or experience that arouses anxiety, terror, agony or great displeasure.
A very bad or frightening dream.
A feeling of extreme anxiety or suffocation experienced during sleep; Sleep paralysis.
To have a nightmare.