Liquid metal is a way of cooling the metal very quickly indeed (early methods used cooling of millions of degrees per second) and so getting your metal into a solid state before the crystals could form.
Their supervisors made the same mistake, so a vital six hours were lost before other methods for cooling the overheating atomic fuel rods were deployed.
The popular topic of conversation is often one of the following: (a) methods of cooling off without breaking the bank, (b) vacation plans, (c) what to wear to keep cool, and (d) weather patterns across the country.