Going through security at BHX (don't ask - I didn't book the flight!) , and I was behind a guy at security who was arguing about not being able to take a huge bottle of shampoo through in his hand luggage. "This is ridiculous. I've taken this bottle as hand luggage on several flights without problem" (clearly a lie), and generally just being an idiot. After several minutes, he finally gave up, left the bottle to be put into the bin and sulkily walked through the scanner, like a petulant child. I put my laptop etc into the tray and walked towards the scanner. As I was walking past the security guy in question, we made eye contact, and at exactly the same time, both said "what a d*ck head" and then cracked up laughing...