After readingPalsgraph v. Long Island Railroad,accessing the funny Nationwide Commercial - Butterfly Effect

, please discuss the following:

[1] What were the facts of thePalsgraphCase?

[2] On what rule did the court determine that there was no liability in this case?

[3] Apply the notes as well as the holding inPalsgraphto the video from Youtube:

[3a] was the butterfly the cause in fact of the boat going through the roof?

[3b] was it the proximate cause.

Please explain fully