The Natural Logarithm Of Pain

This is peak nerd humor that would make even the periodic table groan. The expression "In(NaCl + jury)" is a brilliant triple pun combining math, chemistry, and legal terminology to represent "adding insult to injury." The "In" is the natural logarithm function from math, "NaCl" is sodium chloride (table salt) which represents "insult" (salt in a wound), and the jury is... well, a jury. Put it all together and you've got a mathematical expression for the idiom! Scientists who make puns like this are why we can't have nice things in the lab. The only thing more painful than this joke is actually getting salt in a wound.