What kind of master spy leaks Valve's Meet the Spy video onto the internet in the middle of the night? The same kind that has an entire file dedicated to the Scout's mom.
This is exactly what happens when you're all sneaky. Someone goes and sneaks right back, uploading your introduction video all over the internet. Perhaps this is payback for the Spy taking over the Team Fortress 2 Sniper update halfway though? Either way, the video does feature the best line appearing in anything, ever.