The latest from the oddsmakers at Vegas regarding who he was on the phone with:
Crew scheduing, trying to get another trip out of him once in DTW, 2:1
Current, or soon-to-be ex-wife, 4:1
Current, or soon-to-be ex-girlfriend, 6:1
His flight dispatcher, 10:1
I'm inclined to believe it was the wife or soon-to-be ex-wife; hell hath no fury etc. etc. and they certainly know what buttons to push.
Poor chap....