I had the colossal epic battle between Jeff Zimmerman and Nomar Garciaparra. Top of 9th, 2 men on in a 3-2 game and an 0-2 count on Nomar. He proceeds to foul of 7 straight balls including one that said "if it's fair, it's gone!". He then works the count to 3-2 and then proceeds to foul off 4 more balls.
Finally on the 17th pitch of the AB, he looks at one that was right down the pipe for the last out of the game!
Needless to say, the addition of the foul ball has generated the effect desired!