Shrug, I thought it was part of my OCD. I don't know if my reaction qualifies as panic, but I do find myself obsessing over the situation over and over, which isn't productive beyond the first review. If I review the situation with another person, or even just put the thoughts in writing, I tend to find it a little easier to let go of some of the anxiety. I had this experience just this week with an office politics situation. Ultimately, the only way I can hope to get any further answers is to ask the person who frustrated me, why they did what they did, stressing that "I'm confused" so they don't take my question as an attack.