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.
Claudio Bravo
On his return to the Camp Nou on 19 October 2016, in a Champions League group stage match, Bravo was sent off after handling the ball outside of his area, in an eventual 0–4 loss. After a number of high profile errors, including being beaten by all six shots on target in his previous two appearances for City, he was dropped to the bench in February 2017, with backup Willy Caballero replacing him; having finished with the worst save success rate (54.1%) among all goalkeepers, he was named by many journalists as one of the worst signings of the season.