A/N: I had an "Ask Me Anything or Send Fic Prompts" post on Tumblr, to which writingonthecastlewalls "asked:"
Banana? (it is a perfectly legitimate question, okay?!)
And this was my answer. :)
Castle was pretty sure he'd finally got the drop on Kate. It was pretty hard to hide in the dark with a glowing laser tag vest on, after all.
He saw her sneak into his office, just as he had slipped out of his bedroom. As he tip-toed past the kitchen, a plan formed in his mind - the perfect plan - so he grabbed the first piece of fruit out of the bowl on the table he could get his hand on.
Slowly and silently, he eased into his office, seeing that Kate had just opened the door to his bedroom. He threw the fruit, knocking books off the shelf beside her head.
She screamed, and he shot.
The look on Kate's face as her vest brightened and flashed was priceless. She found the object he'd thrown and rolled her eyes. "You threw a banana at me?"
"Yes," he answered, making a show of blowing the end of the laser, "Or as I would like to call it: a banana bomb."