After almost causing cataclysmic destruction to the galaxy through their time experiment, Data saves the day. Most of the scientists from the experiments die, and after the crew manages to save Dr. Manheim, he says something along the lines of "we have to go back and keep trying with these experiments...." I would have beamed him into outer space after he suggested that. You nearly destroyed civilization and you want to keep messing around? But Picard agrees and smiles. That's my contribution to stupid stuff in TNG.