I just cracked open a beauty. Its a shipwreck porter from Artisan Ales. Its a bourbon barrel aged porter. I put it in the freezer to let it get a little chilled and let it sit in there for too long. I poured it into the glass and took a sip. It had a little sour taste to it. I let the glass sit for about 15-20 minutes and warm up a bit. The sour taste seem to fade away as it got warm and developed a more refreshing boozy taste. Has anyone experience this or have any reasoning why? I am assuming its because it was too cold, but this is just a guess.