touch lamp fright

last night i got up to go to the bathroom at 2:30 and when i came back into my room my touch lamp was on. now i definitely did not turn it on before i left because it's all the way across the room. i stood frozen in the door frame for a minute, trying to figure out all the places a grown person could be hiding in my room. first i checked behind the door, then i walked across the room and grabbed my guitar stand. first i banged on the person looking shape my comforter had made when i got out of it, then poked in the dark places in my closet, under my bed, and behind my bed. luckily there was no one there! (i don't know what i had done if i had actually poked a person!) my only thought is that a bug or something landed on the lamp while i was in the bathroom. still...very weird.