This is the first turn accident that ended with four riders down and out in Sunday's Valencia MotoGP season finale.
The incident was triggered by contact between Suzuki's Alvaro Bautista and Repsol Honda's Andrea Dovizioso. Bautista then fell and collected Ducati riders Valentino Rossi, Nicky Hayden and Randy de Puniet.
Thankfully, all were unharmed.
See below for the full sequence...