BILL & TED'S EX. ADVENTURE SOUND QUESTION — Media Films — DVD MP3 AVI MP4 players codecs conversion help

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I am new to newgroups so here goes
i have just watched Bill & ted's excellent adventure does anyone know what
the music is at the end of the film that was playing in the background when
the boys are jamming with Rufus can anyone help in suplying or know who the
group or artist is playing
I thank you in advance for any replies

Richard Fell