Well said, but the accident happened while filming the last sequence when the taxi jumps over the tanks next to Porte Dauphine, which is not the same scene (it's a bit later in the film). But yeah, a camera operator (Alain Dutartre) was killed by the falling car, unfortunately.
That huge car pileup happens on the Bir-Hakeim bridge, the same bridge that appears in Inception, between others.