Sleep Running?

Last night I woke up at 2am and heard T climb out of bed and start down the hall. I thought he would come into our room, but he blew right past. I listened for a bit and thought I heard him call "mommy" from the other end of the house so I got up to see what he was up to. He was standing between the kitchen and dining room when I came out in the hall. He waited for me to come and pick him up and then said in a very sleepy whisper, "I was just running down the hall." He was so groggy I had to ask him to repeat it. I don't think he was even fully awake, silly boy!