This episode takes place at Polkapalooza and uses the same name as said episode.
As a result, this is the only HTML5-exclusive episode with only one word in its title.
Coincidentally, both episodes are followed by an episode named Soda Swamp.
This is the first episode that the exact setting from previous episodes was reused for later use. The trend of using the exact setting from a previous episode in a much later episode starts here and has continued to this day,