There was an eerie similarity to the crashes of Sergio Perez (left) and Nico Rosberg (right) during the run-up to the Monaco Grand Prix. One major difference separated them, however. Perez hit a safety barrier. Rosberg miraculously skidded past it.

Rosberg's happened in final practice on Saturday morning, and Mercedes mechanics repaired his car in time for the afternoon's qualifying session. Rosberg will start the race tomorrow seventh on the grid.

Team Sauber's Perez was not so lucky. After an agonizing several minutes, during which an ambulance crew and the official F1 doctor swarmed around the wrecked car, Perez was taken to a local hospital. He'll be under observation for a concussion for the remainder of the weekend. Needless to say, he's out of the race.

Note that after Rosberg's crash, race officials pulled up the chicane's speed bumps, or "sleeping policemen," which he bounded over during his shunt. When Perez went through, he slid straight through, into the barrier. No predicting this stuff.