Clark came flying back through the window, dressed as Superman. He didn't understand why he couldn't stop -- it just didn't make sense!
"It was a false alarm," he began. "But the weirdest thing happened -- I couldn't *stop*."
Lois looked at him for a moment, puzzled as he spun back into his previous state of undress. "Sweetheart," she began, "have you thought that it might not have really been a false alarm? Remember the tests that Lex put you through after you created Superman?" At his nod, she continued. "Maybe someone set off the alarm to test you again... or test something on you."
"It's possible," he agreed.
"Promise me you'll go to Dr. Klein in the morning and get checked out?" she asked. "You can also get him to give you one of those special kryptonite Geiger counters that he's been playing with."
"Okay," Clark said with a sigh.
The next morning, he went straight to Dr. Klein and borrowed one of the Geiger counters. In a few hours, he caught Jerry with the red kryptonite. Soon, he even managed to catch Mr. Wizard and his bumbling son due to the fact that the kid had accidentally left behind evidence at the scene of the theft from the evidence lock up.