Stolen: My Pride and Joy

Our next door neighbour had four bikes stolen before she gave up. They cut through an inch thick railing for one and *used liquid nitrogen* to break another.

WTF do they get *liquid nitrogen* from!? is it that easy to come by?

Its not particularly easy to come by at all, because its got to be stored at 77 Kelvin (−196 °C; −321 °F). This obviously entails use of a special container even for transport of a relatively short journey. My dad is a retired veterinarian and a specialist in animal husbandry. He used to carry this stuff around, as bull sperm was kept in the "tank", at the right temperature.

I think the substance used might more likely have been plumbers' pipe freezing spray. There should have been no way to detect use of liquid nitrogen afterwards, as it would have dissipated rapidly and become just part of the air that we breathe - which is 78.09% Nitrogen.