strange dream

I woke up sweating from this weird dream, so vivid I thought the waking up was a dream, not the dream itself. I go to a highschool reunion. Everyone is there, but I am awful quiet because my current job is a secret agent for the US of A. In order for me not to expose my identity, I am given a shot directly to the head, followed by a brief blackout. Then I am sworn in to never betray the country along with my fellow soldiers.