I had my tech in hand luggage by mistake, forgot to put it with the blades in hold luggage. Bag got searched, then put back through the x-ray machine. Thing is though, I'd had a hair cut recently, and asked the barber for a few blades they use for shaving, he gave me a couple, which I popped into my wallet. I didn't realise the blades were there until I was paying for something whilst abroad. So whilst the guy was checking my luggage, I had two de blades in my wallet, having completely forgotten they were there.