I had a chem 4 s1 from Dr greenthumb that got accidentally pollinated outside, maybe by a 2 pounder from kiwi seeds, not sure. But I used a male to bx, grew about 10 of those and one was that obnoxious smell and unlike the others stacked into solid colas, with no visible lumber. Most cannabis raunchy nasty smells are nasty in a good way- love to smell. This one plant was bad, made me sick to smell it, not nasty good but nasty bad like puke vile vomit, this all while in flower. No way I was keeping it, and now I regret it because cured the smell was still nasty but bearable but everybody loved it. Growing the GMO was like deja vu. I've grew a lot of crosses with the selfed version of #4 and a few with the #4 clone and none have come out with the D vomit except that one, still have a handful of those bx seed though.