Two of my black Runner drakes like to play tag. They'll wait by the fence, chatting away until you come close. Then they'll start reaching out to pull on your pants leg until you come in. They love to play tag, especially with my 10 year old
It's not hostile at all.. if you stop, they'll stand there and wait for you to get going again, then chase you around with their little heads down, quacking the whole time
It's terribly cute.