I was flying back from LAS to SFO with America West on Friday evening and I was sat in 22C near the back of a 737-300. I was reading a travel magazine that had a feature about essential travel kit. One of the items was a Swiss Army knife. The FA noticed in the dim lights that I had a knife on my seat-back table and rushed over in a panic only to realise that it was in fact a picture in a magazine. He laughed once he realised but he told me he was terrified for a few moments. Is this funny?