(This is a dream from somewhere within the last 10 days. I forgot about it in the day and now I'm not sure when I really dreamed it.)
I'm in an old wood cabin with partially broken walls, and therefore several entrances. There is a group of people with me, and we're all paying attention to the walls, as the place is surrounded by zombies. Some of us have guns, and I am holding my pendrive as one, for some reason. The zombies start to attack, trying to invade, and I'm always the fastest one at noticing it. I turn and yell at the others whenever I see one, so they always shoot them on time. At some point I dive on the floor trying to shoot out of my pendrive, but alas, it doesn't work. A cocky guy shows up and tells me I can't shoot because my pendrive, unlike his, didn't have a trigger. I look at it and it actually uses ones. Strange.