The Elon Musk thing is embarrassing.
Fine that he wants to help, that deserves praise in itself. But he must know that showing up, with completely unproven technology on (hopefully) the last day of the operation when everything so far has gone better than expected, is completely idiotic and will be regarded as nothing more than a stunt to brand yourself and your technology.
edit: come to think of it, his appearance is about as weird as that time Paul Gascoigne showed up to help that maniac on a shooting spree with a fishing pole and some beer.
As if that tube thing could get through a u-bend that goes down to 35cm wide.