Milton Erickson did some interesting studies on using hypnosis to get subjective time to go slower for his subject (Time Distortion in Hypnosis: An Experimental

Milton Erickson did some interesting studies on using hypnosis to get subjective time to go slower for his subject (Time Distortion in Hypnosis: An Experimental and Clinical Investigation). The interesting part is that it works and has measurable results. From memory, subjects that have been made to feel that times goes slower would be able to count more objects in the same (objective) time.