I experience that a lot. Sometimes I've had to ask those involved in my dream if what I experienced actually happened. Apparently, if you become fully lucid, it's impossible to tell the difference between dreams and reality. It's kind of awkward when you're unsure of whether or not you've had sex with somebody, and you don't even drink.

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram