I was in a house that was perhaps being rented; I’m not sure of the circumstances, but basically I was in the basement area. Suddenly a bearded dude just showed up; I saw him off to the side, near the lower side-door, and he just came in unannounced. He then began fiddling with a gas stove and then was playing with his lighter flint in a compulsive, suggestive way, which conjured thoughts of Beavis chanting “Fire! Fire! Fire!” So this made me believe that he was there to blow the place up, and that was a serious problem, because my sister was upstairs. I immediately yelled up to her that she had to get her stuff, PRONTO. I ran upstairs to where she was; she was just relaxing in a white tub in the middle of the bathroom. She could tell from my tone that this was serious, so she didn’t delay or push-back too much about the urgency, but she did express some doubt about my cause for concern. We then went downstairs, and out through the basement area where I’d been before. The dude was still there, but this time was just sitting on a couch, like just chillin out. I kinda asked him in passing “You gonna blow the place up?” — it was one of those things where I wouldn’t expect him to tell the truth if it indeed was his intention to blow it up, and he would probably consider an expression of firm denial to appear as guilty demeanor; so his silence in this case was interpreted by me as a form of tacit admission of something absolutely not-above-board going on. I had a suspicion, and to me it was not worth the risk of hanging out to see exactly what he was going to do. So, my sister and I got in a car and drove off. By then it had become evening, and as we drove away my sister expressed some belief in our response being an overreaction. As we drove down the street in the immediate vicinity of the house, we saw a kid on a big-wheel riding in the street coming in our direction. He was with a group of other kids; I’m not sure about adults/supervision, etc, but I think they were off to the side on the sidewalks.