That was on 24h Le Mans (24h race in France) in 1999. The Mercedes had aero-dyanmic misconceptions. The car took off at 350km/h at the top of a small hill.

The other Mercedes was taken away from the race after that crash.

The sad thing is that the cars already crashed during the test days, but the engeneers only added a small flap, hoping it was enough. But ot obviusly wasn't.

Weber was the pilot harmed during the test, Peter Dumbreck during the race. Both survived. Weber is still driving for Mercedes.