I have had a similar experience with a former roommate of mine. For reference, he's a 6'6" black man, and is into White Wolf games, including STing at 2 Vampire LARPs.
So we're heading to a party at a friend's, who lives in the middle of nowhere. We get there around 8:00 (well after dark), and my roommate gets out while I finish parking. Now mind you he's wearing a dark shirt and black pants. I get out of the car ... and can't see him anywhere. I call out, and all of a sudden I see this floating smile appear out of the darkness about 6 1/2 feet in the air, 20 feet away. It was freaky.
He has since dubbed this power "Blackuscate" (after the vampire discipline Obfuscate, which is the power used to conceal yourself).
My best friend has the same trick (he's white though). He doesn't even mean to do it, but virtually everyone will forget he's in a room.
Case 1: It was really bad. We sat together in our Chemistry class in High School (a little over three years ago). The teacher never called on us to answer a single question unless we moved back two more rows, even if one of us was sleeping during class (and I mean audibly sleeping, not "head down, do not piss me off" sleeping). He even managed to pass the class with a B, despite the two of us never doing a lick of work. I passed because I'm damn good at tests and lab work.
Case 2: During a college Humanities class, the instructor wanted to start showing the class a video after they got back from break. My friend never even left his seat to go on break. Everyone comes back, and the teacher waits for 10 minutes. After the 10 minutes passed, he said "We'll start the movie when [Friend] gets back". People started snickering. It was a good 2 minutes before the instructor finally asked if anyone knew where my friend was. He raised his hand and said he's been in the room the entire time, and he never left for the break. Cue laughter from everyone else. Again, he was sitting in the front row.
Case 3: Several times, he's been over to my house only to hear my parent ask if he left. Mind you, she's in the same room as he is when she says this. Every. Single. Time. It never gets old.
This friend of mine isn't exactly easy to miss. He has enough hair that we joke about him being on TV every time a Big Foot claim gets aired (seriously, his arms make him look like he's wearing a damn sweater). He also looks like a body guard (and even has the black belt in Judo to back up the image). Furthermore, he may be quiet, but his voice is deep and loud enough to hear a mile away. If he says something, most people will hear it (and pay attention, as he is very intimidating even when he doesn't mean to be).
Seriously, the guy's built like a grisly. How these people manage to overlook him when he's right fucking there is beyond me.
And, to finish the post: I found this particular part funny. The irony tickled me.
