Apparently if you cryogenically freeze. . . . then unfreeze. . . . cables the copper molecules line up in the same direction, which is supposed to make the electrons flow more easily, which in turn improves the tone.
My post was tongue-in-cheek, but this is something Gilmour's tech, Phil Taylor, says bought benefits when they did this. I believe they froze instrument cables amongst others, and thought the tone was improved. I have no idea whether this works or not, but if those guys think it did then I'll believe them.