Alphabet Boys have been using them for a while now...
They can be used as for offence as well as defence, though.
<iframe src="//player.vimeo.com/video/98581051" width="500" height="281" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
They can be used as for offence as well as defence, though.
<iframe src="//player.vimeo.com/video/98581051" width="500" height="281" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>