Lithium hydride
Before the Castle Bravo nuclear weapons test in 1954, it was thought that only the less common isotope lithium-6 would breed tritium when struck with fast neutrons. The Castle Bravo test showed (accidentally) that the more plentiful lithium-7 also does so under extreme conditions, albeit by an endothermic reaction.
El Castillo del Terror (2007)
El Castillo del Terror (2007) was a professional wrestling event, their annual "El Castillo del Terror" event produced by the International Wrestling Revolution Group (IWRG). IWRG has held an "Castillo del Terror" branded show since 2005, usually late in the year, making this year's event the third overall event in the series. The event took place on November 3, 2013, at Arena Naucalpan in Naucalpan, State of Mexico, IWRG's main arena. The main event was the eponymous "Castillo del Terror" (Spanish for "Castle of Terror") Steel cage match where the last person eliminated was forced to unmasked per the match stipulation. In the end the ten-man match saw Rayo de Jalisco, Jr. defeat Enterrador 2000, forcing him to unmask after the match.