Lucy, who offends everyone, is not all that surprising to be one on Snoopy's bad side occasionally. However, even pals like Woodstock aren't safe from Snoopy's temper once it is out of the bag.
But in a classic Charlie Brown moment, when he finally hits the ball, it goes out, and Snoopy realizes the code of the tennis player. Live by the bad call, die by the bad call. Charles Schulz ...