A Horsham man accused of punching a 13-year-old boy in the face has been ordered to stand trial in Montgomery County Court. 32-year-old Nicholas Arena of Green Meadow Lane is charged with assault and other offenses. The incident unfolded one Thursday in April, shortly after a group of Keith Valley Middle School seventh graders got off their school bus in a condo and town house development near Norristown and Horsham Roads. They saw Arena walking his Rottweiler, and they asked if they could pet the dog. Police say he walked away at first, but then circled back, directed a racial slur at a black boy and punched his white friend, knocking him to the ground and bloodying his nose. Arena is about 190 pounds, and the boy is about 120 pounds.