The 2-minute song by the very odd psychedelic-folk duo the Holy Modal Rounders would likely be lost to history were it not included prominently in the 1969 cult-classic Easy Rider. There are two versions that I would like to cite for you - it's the same song but the visuals are different:
This version is accompanied by extemely psychedelic graphics - well worth it. See that version HERE
In the movie, the song played after Jack Nicholson had joined Dennis Hopper and Peter Fonda on their motorcycles headed east to Mardi Gras in New Orleans. The clip in the movie is seminal - this included the decision by George (Nicholson) decides to go with them ("Oh,... I've got a Helmet. Oh, I got a beauty!") and also well worth the trip. See the movie clip with song: HERE