Dave Bunnell has an awesome site dedicated to caves and lava – this one above is a picture of tubular lava helictites:
Helictites are an eccentric or "vermiform" form of stalactite that twists and turns rather than growing straight up and down. They typically begin as tubular lava stalactites, but crystallization of the emerging lava as it cools pushes the lava in different directions. Often groups of these helictites will bend in the same direction down the passage, suggesting an influence of wind moving through the tube.
Posted by Alex in Pictures on January 14, 2006 at 2:02 am
From the website:
The upside-down balloon appears at first glance to be standing on its head. In actual fact, there is a concealed cabin on the underside and a further dummy cabin on the top.
Ye Xiangting told the reporter about his recent visit to the Yangzhuang police station to get a photo taken for a new ID card. He sat in front of the camera, but no image of him would show up in the photo. The staff checked the camera very carefully, but found no problems. He retook photos of Ye Xiangting, but no photos of Ye Xiangting was found on the computer images.
The staff could not find a reason. They took images of Ye Xiangting with other people. They were stunned when the other people showed up in the computer images, but not Ye. Ye Xiangting seemed to have "disappeared" from the photos. In the end, the staff had to give up …