In Sasha Shulgin’s book PIKAL, he describes mixing two drugs, I think it was MMA and cannabis, and experiencing perceived time dilation. He describes it as look

In Sasha Shulgin’s book PIKAL, he describes mixing two drugs, I think it was MMA and cannabis, and experiencing perceived time dilation. He describes it as looking at the hands of a clock and experiencing much more time between the movement of the hands than one normally would. He said it was frightening, so he called his friend to come help. He was able to speak normally and hear people speak normally. While he was on the phone, he asked for a timer to be set while he went to go retrieve something. His experience of walking down the hall and back felt to him like twenty minutes. When he returned to the phone, he was told it had only been two minutes. The effect wore off by the next day. He was never able to recreate the effect, but he kept a battery of experiments at the ready of it ever happened again. He expressed regret at not being able to carry them out. He once said that the experience changed his perception of death. If time were to continue dilating, asymptotically approaching a halting of time, then one might never die in their own experience.