A. During one exhibition, however, some air became mixed with the hydrogen, and in the words of the shaken performer: "The explosion was so dreadful that I imagined all my teeth had been blown out!"
B. An entertainer would finish his acts by blowing the hydrogen he had inhaled towards a lighted candle; as the hydrogen caught fire, flames would shoot menacingly from his lips.
C. A paper bag filled with hydrogen amazed guests by zooming off into space.
D. When people learned about its unique lighter-than-air property, they began to use it in all sorts of parlor stunts.