Microsoft doesn't like fierce competition and sometimes their CEO Steve Ballmer can overact quite a little as you can read in this quote:
Ballmer's threat last November was recounted in a sworn declaration by a former Microsoft engineer, Mark Lucovsky, who said he met with Microsoft's chief executive 10 months ago to discuss his decision to leave the company after six years.
After learning Lucovsky was leaving to take a job at Google, Ballmer picked up his chair and hurled it across his office, according to the declaration.
Ballmer then pejoratively berated Google CEO Eric Schmidt, Lucovsky recalled.
"I'm going to f---ing bury that guy, I have done it before, and I will do it again," the declaration quotes Ballmer. "I'm going to f---ing kill Google."