SketchDeck founders (David Mack and Christopher Finneral) hired an engineer for COO then suddenly unhired ≤ 2 weeks later, after the guy had turned down other offers, sold house, AND started working by signing up more customers, using his network for investor intros, etc. All they told him was that their needs changed, wanted someone with a different skill set. No severance/compensation for the disruption personally and professionally.
http://bit.ly/1nG8m8o