I had a 'bomb' experience once, in Keswick a few years ago. I'd left the YHS building there and walked to the bus station, it was a bit after 8 am so whilst waiting I decided to have breakfast in the cafe next to the supermarket. I walked in and there were just an elderly man and his wife sitting nearest to the supermarket products just behind them. I wondered in, nodded to them, propped up my rucksack against the wall by the entrance and walked over to the counter, and placed and paid for my order. I then sat all by myself by the cafe window. Within a few minutes, my scrambled egg on toast arrived and I started eating.
Within a minute or two a uniformed Police Officer came in and walked over to me. "Excuse me Sir, is that your rucksack?" It is I said. He then told me that someone had phoned the Police worried that my rucksack might contain a bomb, "can you open it for me." I course said I and proceeded to start to take my stuff out and place it on the floor. By now the Police Officer I think was bored and he stopped me and said "That's fine." He then wandered off. I turned around the elderly man customer said "Sorry, I didn't know who it belonged to."
I was amused by the experience up until that moment, but his limp excuse irritated me, and I told him that he knew exactly that the rucksack was mine, they had both seen me come into the cafe, we had acknowledged each other and we were still the only three customers.
I'm sure it was also the Daily Mail on their table that turned me from being polite to being impolite and I bet I muttered "Typical!" as I went back to what was now cold food and cold coffee.