Already got it:
<a href="http://www.youtube.com/watch?v=SSUqsMOVXn8">YouTube Link</a>
Now, lets begin
The 02 has been behind that 9 car for a long time and knowing this is Montoya (by now, who didn't know Montoya was in the car?), he was foolish for trying to cut back to the inside knowing this guy was going to pull an aggressive inside move at (at 9:49). Montoya didn't wreck him on purpose, Barbosa chose a poor time to cut directly back to the inside.
It was Dalziel that pushed him into the grass at turn 1 and seeing how wet that grass was during the race, he gets punted by a car that couldn't slow down in wet grass. Again, Dalziel got himself in that racing Montoya like that.