ASI Senior Vice President, Richard McSpadden, CFII, MEI, SES, MES, former Commander/Flight Leader for the USAF Thunderbirds gives a respectable preliminary analysis of the incident. The health as well as the most recent activity prior to this flight for the Cobra pilot will certainly be a factor as well as the competency of the air boss.
Dan Gryder (a controversial figure) gives his brand of in your face analysis, go to the 32 minute mark in the following, what he has to say adds to what could well be a contributing cause outside of the actual flying itself.