Train:
Didn't he write something like $500 pr gallon ?
Anyway, it was a fun read. The part about holding the LN2 in thermo's really reminded me of when I was studying to be a Chemical Engineer (gave it up for computers), and some genius tried to transport fluid Chloride in thermos, which leaked 🙁
Luckily noone was seriously injured, although something like 10 people was taken to the hospital, and he was ever after thoroughly avoided whenever he was seen in the halls with a thermo 😉
I had a teacher who demonstrated LN2 to us, it was great 🙂
He started off by freezing a rubber tube and smashing it with a hammer, which is a pretty ordinary way of demonstrating, but the proceed to throw it at people! Of course it evaporated before it reached us, but the shock effect was there 🙂
He finished off by pouring the remains onto his desk and leaving, it was great fun 🙂