A new discovery has been made regarding lasers. Apparently when a certain type of Laser beam (Bessel) is focused on an object at a certain angle, the object that the beam is aimed at will 'absorb' and 're-radiate' the incoming light. The light that is 're-radiated' forward will give the object a push back towards the source of the laser.
Source here:
http://www.bbc.co.uk/news/science-environment-12620560
This is a really interesting topic and could open up many new ways for laser's to be used. Apparently this only affects an object over a short distance, but hey, it's a start.
/Discuss?