He's saying that this was no accident.
4 seconds sound clip from the Iron Man (2008) movie soundboard.
You can hear this line at 00:28:04 in the Blu-ray version of the movie.
Quote context
[...]
- I don't see him in the driveway.
- I think he bounced into Sid's yard!
- Hey, everyone, R.C.'s trying to say something.
- He's saying that this was no accident.
- I mean Humpty-Dumpty was pushed... by Woody!
- What?
- Wait a minute. You don't think I meant to knock Buzz out the window, do you? Potato Head?
[...]