I believe he was making the point that last summer it went down a bit (presumably off the $8 highs) into the $6-$7 range before moving back up over time to the $12s+. I believe he is speculating that it is currently down a little again as it was then (from the $14+ highs), but that it will rise to the $20s over time similar to how it rose last year.
I don't think he was claiming that he believes it will drop to $6 or $7, just that it is currently down and will be rising slowly-but-surely over time.