Flabbergasted 
1 : overwhelmed with shock, surprise, or wonder : DUMBFOUNDED

Example from the New York Times
The word flabbergasted has appeared in 37 Times articles over the past year, most recently in " Mauer Return Gives Twins a Boost in A.L. Central Race " on May 5, 2009.

The longest-tenured Minnesota Twin, right fielder Michael Cuddyer, needed two words to summarize Joe Mauer's storybook return to the Minnesota Twins and the American League Central race last Friday night: ''Only him.''...

...And Mauer, who last season did not hit his first home run until June 2, was not finished. On his second swing, after taking two strikes, Mauer lined a double inside the left-field line to start a four-run rally in the fourth inning. Mauer finished 2 for 3 with a walk and scored three runs in Minnesota's 7-5 victory over the Royals, to the flabbergasted admiration of his manager, Ron Gardenhire...