Saw this on another site I go to.
I guess it's real. I almost thought it was sped up, but the closing rate on the other cards, speed of the people/birds, etc all look real.
Wikipedia says it's real:
C'était un rendez-vous is a short film made in 1976 by Claude Lelouch, the director of Un homme et une femme. Lelouch's own car – a Ferrari 275 GTB – is driven by an anonymous driver at breakneck speed through the streets of Paris just after dawn, for a romantic "rendez-vous" at Basilica of the Sacré Cœur.
Overview
This cinéma vérité film was made in a single take with no editing, using a gyro-stabilised camera mount attached to the front of the car. The length of the film was limited by the capacity of the camera reel (under 10 minutes). There is no dialog, and the actors only appear briefly at the end; the driver's face is never shown.
Lelouch apparently sought an official permit but was denied by municipal authorities. Combined with low traffic, this probably influenced the early-morning hour of the shoot. The driver, purportedly an F1 racer, frightened unwitting pedestrians, scattered birds, ran stoplights, went the wrong way down one-way streets, crossed center lines, and ignored other traffic laws, in addition to speed limits. A close analysis showed the car at times approached 140 mph (220 km/h). Obstacles such as buses, garbage trucks, and small knots of traffic forced detours and abrupt downshifting. Though no police were encountered during the shoot itself, when Lelouch showed his film in public, he was arrested. Apparently no charges were ever filed, but as a result the film remained underground for many years.
Well, anyways here is the link. You'll need high speed internet to watch it because it's like 10 minutes long. Very cool though.
http://www.subterfugium.com/rendezvous20_04b.mov