Had a prof tell horror stories about this kind of thing happening. Peers who started at a similar time were already postdocs or in industry, meanwhile their colleague had yet to defend cause their PI just would not let them go.
An avoirdupois pound is equal to 16 avoirdupois ounces and to exactly 7,000 grains. The conversion factor between the kilogram and the international pound was therefore chosen to be divisible by 7 with a terminating decimal representation, and an (international) grain is thus equal to exactly 64.79891 milligrams.
"Klaes, there's room in the airlock for two, correct? We don't need to cycle the air twice?"