The Game Thread from our last game of the season gives some accounts of Donnelly's wacky behavior in his final appearance as an Angel (scroll down to near the end).
As I recall, in the middle of blowing the game open in extra innings, he took a liner off the ole nutsack, threw a ball away for an error and then brushed off a Jeff Mathis visit to the mound, marching toward the dugout thinking he was going to be removed from the game but he was not - scroll to the Tenth Inning to see the play by play recounted.
Your specific recollections and the order in which they appeared may be different, fell free to fill in the blanks as many people have requested a recounting.