i do that a lot. sometimes when somebody talks to me and what he's saying is kinda long and boring, i find myself spacing out until i can't hear him anymore. that's when i start to daydream. i think about what other more important things i should be doing now instead of listening to him. or what i will eat for lunch. where i will go after school or work. those stuff usually. what about you? how often do you daydream and what are you daydreams about?