I was given IV Ketamine in the hospital after a 4-level laminectomy. My face and throat started swelling, the "nurse" stopped the infusion, but flushed the line and pushed all the remaining drug into my arm. I immediately lost my vision, hearing, and ability to move. I thought I was dying or having a stroke.

Later, how much later I have no idea, when I regained my senses, the "nurses" were laughing at me ... saying "oh, you're just high. " Having gone to college in the late '70s, I've been high. This was not being high. It was terrifying!