I am just curious about this. I know that LDs take place mostly during REM about 5 to 6 hours after you go to sleep. Last night was different from me. I have 2 or three short lucid dreams ( each of them more or less 2 or 3 minutes) just after 2 hours or less I went to bed. I waked up at 12.45 to go to the bathroom. Those dreams were separated from each other but the plot and the caracters were just the same.