I was in a tranze???

yesterday while reading my science i was falling asleep cuz i normally do when i read and when ever i even closed my eyes i was in a another world! seriously! i was like talking to me and myself (i was i at the time apparently) and they kept telling me (actually I) that i had to wake up and read my scienee! and i would wake up and be like whoa! i am gone! but it was soo weird! and this would happen over and over again! it was weird and cool. i was tlaking to me and myslef about .... i dont remember but i can like control this now and so i can go in and out by closing my eyes!! i did it in the store and people were probably staring at me but i wouldnt know cuz i had my eyes closed! it is really cool!
question for you:
Has this or does this happen to you????