Sinkhole may exhibit a visible opening into a cave below. In the case of exceptionally large sinkholes, such as the Minyé sinkhole in Papua New Guinea or Cedar Sink at Mammoth Cave National Park in Kentucky, an underground stream or river may be visible across its bottom flowing from one side to the other. Sinkholes are common where the rock below the land surface is limestone or other carbonate rock, salt beds, or in other soluble rocks, such as gypsum, that can be dissolved naturally by circulating ground water. Sinkholes also occur in sandstone and quartzite terrains. As the rock dissolves,
Pain Is a Warning 2007 financial crisis which, according to Austin in a video interview, nearly caused him and his family to go into poverty. The track "Remember to Forget" was written about Austin's mother, who at the time was suffering from Alzheimer's disease. The album's title was inspired from a conversation Austin had with his son. Adapted from the "Pain Is a Warning" liner notes. Today Is the Day Production and additional personnel Pain Is a Warning Pain Is a Warning is the ninth album by Today Is the Day, released on August 16, 2011 by Black Market Activities. "Pain Is a Warning"