My buddy/dealer hooked me up with a bowl of some sour diesel awhile back. I remember it having a good taste to it and a unique high. I watched a movie directly after, and while staring at the screen I would be sober, but a few seconds after looking away I'd be totally wasted. I watched the movie straight through and when I got up after it felt like I just finished blazing (like it put my high on hold, never have had that happen before).
My last sack was of some sour lemon diesel (in wich actually smelled like lemons). It was incredibly potent.