Here's Frank Zappa with John & Yoko at The Fillmore from 1971
http://www.youtube.com/watch?v=NXT_yT2lAGE&feature=PlayList&p=DD0DDD16F14411C6&playnext=1&playnext_from=PL&index=2
Frank was not to happy...here's why.
http://www.youtube.com/watch?v=K1cx-Q88cxw&feature=related