Here at my university, there is a group of students that plays Humans Vs. Zombies
(HvZ), it's essentially a week long game of tag. The basic premise of the game is this: There are two teams, the humans, and the zombies. Everyone starts off as a human (except for a select few; more on that in a bit). The humans goal is to survive, and stun zombies by hitting them with a nerf projectile. This effectively stuns the zombie for 15 minutes and they can escape. The zombies goal is to tag humans. Doing so converts that human into a zombie. Both factions have indicators on them so it's clear to see what side they are on. To start off the game, a few are picked to be the original zombies (OZ). They wear indicators that say they are humans, they care nerf blasters, etc. But they're really zombies (they can be stunned, and smart players "stun check" humans during the OZ period). They are essentially a spy asassian. They need to be sneaky, covert, etc. and tag the humans without another human noticing and then blowing their cover, and make sure any attempt they make is successful.
I was picked to be the OZ during the fall 2012 game. I tagged 18 people over 2 days (former record was 7 over 3 days). Simply put, I kicked ass at this as I was able to fully put socializing to the test. I have many tag stories from this, but I am going to explain just one.
I was walking down the main road acting like a paranoid human, which doubly allowed me to see where humans were at all angles. I was also carrying a gallon water jug for a mini-mission. I see a human girl walk out of a building a ways away from me and I think to myself "nah... too far away". But, something clicked in my head. I switched over to autopilot. It was almost like I was watching myself do this. I waive to her and say "hey! have you heard about the mini-mission the mods are running right now?" She stiffened and clearly was on guard, so I kept my distance. I was well out of tagging distance. She fiddled with her bike lock and stuff. She hadn't heard about it, so I explain. "Yeah, we transport waterjugs back and forth and each one the players bring increases a total the mods will donate to charity". As I'm doing this, I am looking behind myself over my sholder. There are a lot of people around (mostly non players) as it is class passing time. It seemed like I was looking for zombies, but I was really looking for humans. I did not want to get caught. I go on to ask her about any zombies she saw, I explain to her how I saw a few (which I did) and what happened. As I am doing so, I am sort of pacing around a little bit. Acting animated so I can close my distance between her and I without her really noticing too much. She seemed to be more or less comfortable, and she placed her nerf blaster in her bike basket. Perfect. I was trying to talk with my hands, but because of the heavy water jug, and the nerf blaster I had, it was difficult (I had kept holding them instead of putting one down so it looked like I had no free hand to tag with). So, I moved them both to one hand, so I could emphazise a point I was making with my free hand. Midway doing this, I lunge forward, tag her, and say "btw I am OZ" (this whole event occured over about a minute or two). She then tilts her head up and shouts "FUCCCCCCCKKKKK!", and I say "Shhh! Quiet! You can't give me away!" She was pissed because her halloween costume was based on her being human, which, well, that wasn't happening anymore. She also said "Something seemed off, but I started falling into your trap, and I couldn't stop myself." which made me crack up even more. I took her feedcard and went on my way.