I have 2 pheno's of Headbanger that another person found. Top shelf herb, that reeks worse than anything else I have(about 30 different mothers). One >18" plant stunk up my buddy's 40' x 40' backyard. To the point that he picked it a couple weeks early, to avoid detection from his neighbors.
His Karmdown put out some stinky plants, but nowhere near the level of loudness the Headbanger puts out. Like I said, the two I have smell stronger than GG#4, Corey Stardawg, and those two were the loudest I had prior to getting the Headbanger.