There's a park over there. Let's walk in the park for a while.
那边有个公园。我们去散散步吧!
You'd better go at once, hadn't you?
你最好马上走,不对吗?
On the occasions when they have pushed to shore an unconscious human being they have much more likely done it out of curiosity or for sport, as in riding the bow waves of a ship.