Our Benji used to patrol the fence at the bottom of the garden waiting for someone to pass so he would bark at them, people jumped in fright, it was his favourite thing to do. One night he was patrolling, as usual, I was standing in the door way while he got on with "things" (he wasn't ready to come in yet) anyway a couple wandered along past the garden, Benji waited until they were halfway along the path before he opened up giving the, a fright (psycho!) the couple stopped, the man looked over the fence saw Benji turned to his wife and said, "oh, it's just one of those wee things you put on a mantelpiece" and they wandered off!