#4 - Start-line crash, Germany 1994
The 1994 German Grand Prix is much more famous for Jos Verstappen's incredible fire in the pit-lane, but there was action from the very start with this accident. The old layout of the Hockenheimring was a circuit with narrow long straights separated by chicanes, not dissimilar to what Monza is today, and this caused some spectacular crashes over the years.
However, it was ironically when the cars were at their slowest (off the line), that we saw the biggest crash in Germany. Alex Zanardi and Andrea de Cesaris (who else) tangled towards the back of the field, taking out themselves and both Michele Alboreto and Pierluigi Martini.
The Italian quartet which was out soon expanded to include other drivers, including Mika Hakkinen who slammed into the wall on the outside of Turn 1 thanks to David Coulthard and Mark Blundell and Eddie Irvine, the former braking to avoid an accident only to ironically create one via Irvine. In total, 10 drivers retired from this crash, and there was damage to the likes of Coulthard.