You need your cell phone. You can't live without it! Something like that, anyway. At any rate, you're anxious to go get it. You throw open the door and run through, closing your eyes against whatever might be inside as you go. You quickly find your feet are no longer touching anything, however, and open your eyes. You do not see a jungle or a spaceport this time; you see a huge roaring waterfall, sparkling with power and splendor. It's awe inspiring, so enjoy it while you can, because you're currently tumbling down to the bottom, where you will be shredded by the rocks and pounding waters...