A little too perfect?

So me and Brent were in the kitchen today getting dinner ready. He's peeling potatoes, I'm chopping onions and we're having a conversation about my schoolwork. When I told him that I got 100% for the draft of my sociology research paper, he told me that it was a little disturbing. "What do you mean?" I asked him. "Well you keep on getting 100% every time. I mean, I know you're good, but..." Following a lengthy stare, I asked, "So you mean I'm good, but I'm not that good?"
Quit while you're ahead buddy! I've got a knife in my hands!