The lights went on! Good-natured cheers arose. Bud, grinning but puzzled, left Sandy's side long enough to come over and speak to Tom.

"What happened?"

"I guess some practical joker clicked off the switch."

Bud suddenly caught sight of a stout youth in a plaid shirt and blue jeans, who was standing in a nearby corner. He was shaking all over with half-stifled merriment.

"There's the wise guy! Rock Harriman!"

Rock, an all-star tackle on the Shopton High football team, was well known for his pranks and practical jokes. Bud rushed over.

"Okay! Confess!" the husky young flier roared in a jokingly ferocious tone.

"Don't get sore!" Rock gasped between chuckles. "I couldn't resist. Boy, did you hear everyone squeal when the lights went out?"

Tom grinned in relief. "How about another dance, Phyl?"

As the music struck up again, he squeezed Phyl's hand. "I sure appreciate your concern, even if I didn't rate it."