In the [opening credits to House][1], the visual imagery used seems pretty reasonable - lots of medical images, a shot of the hospital, and a shot of House's team.

But at 0:19, just as Jennifer Morrison's name is shown, the image of a river with what appears to be two watercraft travelling down it is shown.

This seems out of place given the rest of the imagery in the credits. Does anybody know what the relevance of this scene is supposed to be?

  [1]: https://www.youtube.com/watch?v=A4h-zAV0yP8