I am at the airport. I have already been through security and have had my rucksack x-rayed, and now I am in a queue to board the plane.

Eventually I get to the front of the queue and the security guard asks me to stand with my legs open and my arms out. He frisks me down and when he gets to my pockets he finds something and stops.

"Can you empty your pockets please sir?" he asks me.

I put my hand in my left pocket and to my surprise I find a pocket knife. I pull it out and hand it to him.

"What's this?" he asks.

"A knife!" I reply.

"Why do you have this? What's it for?"

"It's just a general knife."

"You know I can't just let you carry a knife onto the plane don't you?"

"I've taken it on the plane before and it's never been a problem."

The knife is stainless steel, with a textured handle and about a 3 inch blade. In the dream I am sure that I have taken it on a plane before.

"What happens now?" I ask him.

"You'll have to put it in your hand luggage. If you'd just like to step out of the queue then we can deal with this."

I step out of the queue and feel annoyed as all of the other passengers move past me. I start to argue with the security guard.

"But surely I could just take it out of my hand luggage anyway!"

"I'm sorry sir, but that's the rules. Please put the knife in your hand luggage..."