Experiences - Anyone ever had a bad ketamine experience?

[Lettish]

Swim has spent all morning reading reports, case-studies, reviews and tests from the Ketamine File Archive, and has honestly been enlightened. Ketamine is such an eye-opening, fascinating substance. However, one question remains in Swim's mind.

Has anyone ever had a bad experience with ketamine? Swim is not referring to when Swiy combined it with alcohol or when Swiy took too much and went stumbling down a busy road. Swim is talking about when the scene, setting and scenario are perfect, Swiy is administering ketamine safely, working towards K-hole, and from then on - any bad experiences?

The reason Swim asks is because during his reading this morning he came across NDE and NBE (Near Death and Near Birth Experiences), which said these are sometimes unpleasant. It went on to say how people had experienced visiting hell.

My Swim has never had a bad experience. His K-holes are always absolutely euphoric, however he would be interested to hear if anyone has had an unpleasant trip, and if they can describe how they felt during and after.