Senna worked his way to 6th from 15th when he hit the dog. He was pretty livid as you can see in the video (not least because he's out of the race but also because he's involuntarily killed a dog). The producers pause the frame a fraction of a second before Senna hits it and so fortunately you don't really see the collision or the dog's aftermath. It is a very long camera shot anyway. Here's the video (don't watch it if you are uneasy about it): http://www.youtube.com/watch?v=j400C3IAOC0