Link to "lost" concert films, including Robert Franks:
http://www.newyorker.com/online/blogs/culture/2013/10/lost-and-found-classic-rock-shows-on-youtube.html
"So he knocks on the door and I say 'Don't come in' and he opens the door anyway and I'm 'What are you doing in here?' And he opens the shower curtain and reaches in and takes the loofa."