One participant recalls a wooden broom being cut by a steam leak, while another identifies the story with invisible hydrogen flames during NASA work. Alex says the two accounts describe different effects: steam cuts bristles and hydrogen sets them alight. He tentatively recounts the hydrogen method being suggested by someone with naval experience. The proposed origin is remembered as a story rather than demonstrated, and the exchange is a historical anecdote about hazards rather than a modern leak-testing procedure.
Notable Point · 1:23:50-1:25:45
Steam leaks, hydrogen flames and the broom story
A disagreement separates a steam jet cutting bristles from hydrogen igniting them.