I was scanning the 'world famous' duty-free at Heathrow Terminal 3 some time ago and I came across a rather strange advertisement (see the image below).

As I was trying to figure out what kind of an ad was this suddenly I realised I had seen this 'ad' before. I just needed to tilt my head a bit (see below!).

I thanked god for limiting Microsoft (MS) software to the airport duty free ad-displays. Imagine if the ticket booking system or the software on-board the plane used MS software!
:D