Canonizing the T-Shirt Cannon

Free stuff makes people happy, but free stuff shot from cannons makes them jump and cheer like crazed monkeys.

That's good for Jake Wilson. His Denver company, Air Cannons Inc., sells CO2 guns that blast T-shirts and other prizes high into the stands of sports arenas everywhere. This winter basketball fans at Duke University, the University of Michigan, and dozens of other campuses will catch scores of souvenirs fired from Mr. Wilson's colorful gadgets.

Each launch helps

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