What’s the scariest smartest thing your pet has ever done?

Once when camping when my shihtzu alice was still alive, she and buster(her shipoo son) were hanging with us on 10' leads. A couple of shepherds were being walked and alice decided to go to the end of her lead to give mighty barks. And although the shepherds were unimpressed, buster thought his mom might be too close, grabbed her lead and pulled her back to the table were they were tied off.
He was very proud of saving the day...