Best facebook ad ever?

[Rooftop]

Last week I visited the website of AdRoll - a firm that sell retargeted ads.

Obvious, but brilliant :  https://s3-eu-west-1.amazonaws.com/uploads-eu.hipchat.com/28194/177435/o533krfrg1yqthf/upload.png

[Rooftop]

Shortly held title.  Another AdRoll ad has beaten it already
https://s3-eu-west-1.amazonaws.com/uploads-eu.hipchat.com/28194/177435/qf4mfs7mvstxxkg/upload.png