A few weeks ago I smoked a pork butt. I have done this many times without a problem. Temps were perfect, smoke was great, even my timing came down to +/- 3 minutes of my projected finish time. The problem was, when I went to pull the pork, it just didn't pull. The only thing I changed was I cooked it in a throw away aluminum pan I have seen several of you guys use before. It was tender and juicy and tasted fine, but it just did not wanted to pull apart. I ended up chopping it up with a knife. *gasp*Any guesses as to what might have gone wrong?