What is hidden in 3D image?

Mr. Johnson, a businessman from Wisconsin, went on a business trip to Louisiana. He immediately sent an e-mail back home to his wife, Jennifer to let her know he had arrived safely.

Unfortunately, he miss typed a letter and the e-mail ended up going to a Mrs. Joan Johnson, the wife of a preacher who had just passed away.

The preacher's wife took one look at the e-mail and promptly fainted. When she was finally revived, she nervously pointed to the message, which read: "Arrived safely, but it sure is hot down here."