Greater ambition as well as a burning desire to be the best of the best is also a common characteristic.

Any school kid can tell you that comets are made of ice. That frozen water burning off is what gives comets their characteristic tails.

Chewing on a piece or two of gum, it seems, helps force fluids back into the stomach and flood the esophagus with alkaline saliva, neutralizing acids that cause the characteristic burning sensations.