Tesla already has a feature to prevent its electric car interiors from overheating. Not everyone knows that, though, and that's a problem when people may call the cops or break into your ride to rescue a pet that's actually quite safe. You might not have to post a please-don't-worry sign on your window for much longer, however. Elon Musk has signaled that he'll implement a "dog mode" in future Tesla software that would tell passers-by not to panic. While he only just agreed to the idea (it's likely a long way off), it could include both a message and the current cabin temperature to assuage jittery humans.