Yea, I saw the whole thing and i reported it. I thought about letting it go because i have seen kids do other stupid things. But i knew I might live to regret that. I gave a note to my teacher telling her "___ has a knife in his backpack. I don't feel safe. You didn't hear this from me though". She was busy but I put it on her desk. My friend opened the note and came over to ask if this was real but we had to sit down. She walked up to me and we both went up and told the teacher. Later I asked how she knew to look at the note and she said "I saw how scared you looked so i thought it was something bad