Normally, that'd just be a cool souvenir for a Bananas fan. However, per "Banana Ball Rule No. 8," a fan catching a foul ball counts as an out. This out was the third in the top of the ninth ...

A fan rips a baseball from the hand of a player trying to make a catch, then is immediately ejected ... when a Houston Astros fan took a foul ball out of the glove of leaping Angels outfielder ...