Knoxville explains grenade in blog post

It was a prop grenade, not "Daltry Calhoun" or "Walking Tall," that caused the concern and could lead to a misdemeanor charge.

Police at Los Angeles International Airport detained the "Jackass" star Thursday morning over the grenade, which they say lacked explosives or a firing pin. He was released in time to make his flight to Miami, where he blogged that a "wardrobe girl" put the prop in his luggage after a shoot.

He credited police and took responsibility for not checking his own bag, adding the zinger that when he saw the bomb squad, he hoped he "didn't bring any of my films in my backpack!"

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