As Rik Myslewski pointed out in his Living with Leopard article, Screen Sharing is a nifty new feature in Leopard.

Rik pointed out that if your Mac is connected to another Mac via screen sharing, and then that remote Mac sets up so that its Screen Sharing back to the other Mac, you can get caught in an infinite loop of Screen Sharing.

To better illustrate this point, we shot this video of infitinate screen sharing. Fortuantely, this loop didn't make our Macs crash. Watch the video below.