An interesting discussion is taking place right now at The Onion's A.V. Club, asking readers to identify "the most rockin' song of all time." The post's author, Steve Hyden, stipulates that it must be a motivating and recognizable song created between 1955 and 1980 and that "it has to be bluesy, but not too bluesy." However, he says it can't be too recognizable. He considers Led Zeppelin's "When the Levee Breaks" for the title but drops the thought because he unfortunately can't separate it from the snore-inducing classic rock radio with which he associates it.
After he makes his choice of the song, he opened it up to readers. Nearly 100 have responded already, including many who suggested other Led Zeppelin songs. In my opinion, whoever suggested "The Bomber" by James Gang may be on to something. Go ahead, toss in your few cents either here or at the original post.
Oh, and while we're on the topic of The Onion and knowing what really rocks, this farcical article was published back in March.