Business Class Upgrade for 20 pence

I fly a lot and always enjoy the odd upgrade. A couple of weeks ago, as I was boarding a BA flight from Spain it happened. As I was in line to board the flight, a colleague of mine, noticed a little badge on my lapel that I'd bought from a card shop in Chelsea last year, which read simply "Please Give Me An Upgrade". I bought it because it made me laugh but as I explained to him it has yet to actually work.Two minutes later we are boarding the plane the head purser noticed the badge, read it, laughed and said "I think that's rather funny, yes I will upgrade you if you want.". Result was a very happy me drinking champagne, and my friend walking past wondering what just happened. The best 20p I have ever spent!