For some people it is, because REM is quicker, and you happen to be awake. Personally, I rarely remember any dreams in naps, I sleep really deeply most of the time in the nap. I do remember dreams in naps, seldom. I think I've only had a lucid dream in a nap a few times, those times when I am barely asleep, I dream the dialogue of the TV if its on. But hey, if it works for you, go for it, some people can WILD very easy in naps as well.