I was in Madrid last week and I saw this really cool piece of Guerilla Marketing by Desigual, the clothes store. Again, it was a very affordable and successful way to get people's attention. Basically, they placed LED screens behind windows in a building in Plaza de Callao. The screens were all synchronized to play a larger image. It was very cool and caught people's attention for over 3 minutes, an amazing accomplishment for an outdoor activity! It would be interesting to see if Desigual's sales actually went up. Below is a snapshot of this.