Newsbombing

Much like Photobombing, it's one who invades a live breaking news report by doing the absolutely ridiculous things in the background or in front of the camera (i.e. dancing, holding a sign, standing beside the reporter)

Boy: WTF! Why is he doing the Orange Justice in the middle of a live report on A soccer match?!?
Girl: LOL! HE'S NEWSBOMBING!!!!