On Tuesday, April 21, 2015 at 1:02:18 PM UTC-7, wrote:
[snip]
Actually, the journalist quoted 'aviation expert' and Reno Flying Service President John Burruel, who said, "Sometimes there is something wrong that you don't know about with the airplane, some fatigue or stress, metal fatigue is a common thing that you hear about and if you don't know about that, and you're staying perfectly within the limits of the airplane, you could still have instances like yesterday." Don't be shooting the messenger. . .

Sounds like John Burruel is suffering from mouth fatigue.