What is that?

https://en.wikipedia.org/wiki/Demon_core

That was a fascinating read! The 2 accidents surrounding it were very interesting to read about. They were both basic human mistakes that led to the ghastly consequences they unfortunately produced. The 2nd accident though, by Slotin–that was hubris. How could one have skirted such simple safety protocols? Dude was controlling a very very very powerful experiment with a screwdriver in his hand being all that stood between the team of scientists and a staggering amount of radiation… Then it slips! 👀