Kinski

'Much of the mythology surrounding Herzog's early work is entwined with that surrounding the lead actor in five of Herzog's best films, Klaus Kinski. It's hard to think of two other regular collaborators who insulted each other so much in their public writings and statements. Here is how Kinski first describes Herzog in his autobiography: "His speech is clumsy, with a toad-like indolence, long winded, pedantic, choppy.... It takes forever and a day for him to push out a clump of hardened brain snot. Even if his vocal cords were sliced through, he'd keep talking like a ventriloquist. Even if his throat were cut and his head were chopped off, speech balloons would still dangle from his mouth like gases emitted by internal decay." It goes on like this for pages and pages, for years and years: "I've never in my life met anybody so dull, humourless, uptight, inhibited, mindless, depressing, boring and swaggering...the spawn of his megalomania, which he mistakes for genius. Herzog is a miserable, hateful, malevolent, avaricious, money-hungry, nasty, sadistic, treacherous, cowardly creep.... He's the same decaying garbage heap that he was ten years ago—only more moronic, more mindless, more murderous." And so on.'

excerpt from GQ article.