Because W|A can tell me that the caloric equivalent of the molasses spilled in the Boston Molasses Disaster of 1919 is 36 kilotons of TNT:

http://www.wolframalpha.com/input/?i=%28Calories+in+2300000+... https://en.wikipedia.org/wiki/Boston_Molasses_Disaster

So you can do unit conversions with all sorts of weird facts, like the nutritional content of molasses.