Simplify the following text for a Grade 12 native English-speaking person.
Original: In 2005 , Mark Lucovsky alleged in a sworn statement to a Washington state court that Ballmer became enraged upon hearing that Lucovsky was about to leave Microsoft for Google , picked up his chair , and threw it across his office .
Simplified: In 2005 , Mark Lucovsky said in a sworn statement to a Washington state court that Ballmer became very angry upon hearing that Lucovsky was going to leave Microsoft for Google , picked up his chair , and threw it across his office .