Careful, you're turning in to me lol. I think of it as tennis related Tourette's Syndrome. Not only does it manifest during matches, especially when Andy is playing Federer, or the umpire/line judges/opponent is a complete fool, it also tends to appear when journalists write utter crap.
You do sort of have to laugh at the way the writer calls Andy a choker though. Let me see, 6 major finals in four years, a major win, 12 major semi finals, an Olympic gold in singles and eight Masters titles. That is one hell of a choker we've got there!