The art of watching TV whilst simultaneously surfing on a laptop.
Practiced by many at many different levels of expertise, but very few achieve true mastery of demanding sport. Great skill is needed to be both immersed in a TV show/film whilst also multi-tabbing
Facebook, eBay and Youtube.
Considered a hobby by most enthusiasts, also known as DSAs (Dual Screen Artists). Like any hobby, specific times are set aside for Dual Screening, and can be practiced for long periods by veterans.
When in this state the DSA is unreachable by other humans, and will not respond to any attempts at communication or other worldly distractions.