Back in college I was flying home immediately after the end of the semester for a family reunion. Flew there, attended, then flew back. On the flight back, I got stopped for additional search by TSA. Immediately, I remembered that I had left my lab dissection kit in my backpack which included a razor blade and long, pointed, pick-like tool. But it turns out that neither of those are what got me stopped....I had also forgotten a half full bottle of gatorade. They were however happy to confiscate my dissection kit as well, after I had (stupidly) informed them of it.