I had an interesting experience earlier this week: I walked up a flight of stairs at my university and found myself in the middle of a scene from Stargate SG-1. As you can imagine, I was quiet surprised. Instead of seeing my fellow university students, I found myself surrounded by humanoid aliens by chased around my bigger humanoid aliends with guns. While this wasn't the first time I've run into a film crew (Vancouver is "Hollywood North" after all), normally they hire people to keep bystanders from wandering in by accident. However, it seems that they didn't notice the stairwell from which I emerged. Once I realised what was happening, I tried to get out of the way, but, needless to say, since I don't look like a member of an alien race (or at least not one of the aliens races being portrayed at the time), I spoiled the shot. The director yelled cut and I was quickly ushered away.