To go home, you usually will use that door over there." I looked where Trom gestured and saw empty space. "What door?" I asked. "Oh, sorry. Until you go through your closet door for the first time there won't be a door there." "So then what do I use now?" I asked. "You use that door." I looked and this time what he showed me was a door-only it looked like a pet door. "Is that an oversized pet door?" I asked.