I didn’t realize that! I haven’t watched either documentary yet, at least not fully.

For anyone interested in learning more, there’s a behind the scenes documentary about Fitzcarraldo: https://en.wikipedia.org/wiki/Burden_of_Dreams

Edit: I forgot to mention there is also a documentary about the tumultuous relationship between Herzog and Kinski: https://en.wikipedia.org/wiki/My_Best_Fiend