Characters
Ricky Bobby appears to be unhurt, but that Wonder Bread car is toast.
— Race Announcer · Talladega Nights: The Ballad of Ricky Bobby

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The announcer reports that the driver seems uninjured, then jokes that the bread-branded car is ruined. Calling it toast plays on both the sponsor's product and the slang for being finished, so the wreck is delivered with a cheerful pun rather than solemnity.
Context reviewed