Balloons full of helium.[1]

Helium is a chemical element that is a type of gas that is formed by combining a deuteron with a triton.

Hank mentioned helium when he was discussing nuclear fusion with Marvin White and Wendy Harris.[2]


  1. As seen in the Season 9 episode The Bizarro Super Powers Team (1985).
  2. As seen in the Season 1 episode The Ultra Beam (1973).

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