I had a nightmare* in which I dreamed that indexical uncertainty put me back in ~1994 with memories from 2009. I dreamt I experienced very weird things for two days in 2009 then found myself in 1994, as a 10-year-old, with my current memories. I also dreamt this was because of indexical uncertainty, and dreamwhen I realized I should start haxing the stock market I also realized it took me so long to figure that out that I must have the cognitive power of my 1994-self with the memories of my 2009-self, so I determined to find others with practiced brains who could best use my future-memories. Dreamthen I realized this state was inconsistent with the idea that indexical uncertainty was the cause, and woke up. That's how I remember it anyway. There were lots of other disturbing details like wondering what to tell my parents about their future-divorce.
*It's a nightmare when it wakes you up at 5 AM, regardless of any other facts.