Dayton Daily News photographr Ty Greenlees writes about his experience of photographing an air show crash in which pilot Jim LeRoy was killed:

What it was like to photograph crash:
A dreaded scene, a sickly feeling

I quickly focused on the plane as it skidded down the runway, clicking away until it came to a rest in the grass next to runway 24R-6L. Flames shot out from under the wings and it was soon engulfed. A sickly feeling fell over me.

The wives of the pilots were crouching a car's-length away, holding each other. I felt horrible for them.

[...]

My hands were shaking as I tried to take the disk out of the camera.

The thing I never wanted to see or photograph had just happened.

Here are the photos of the crash and aftermath (thanks Wes Hope for the link) and a video of the incident shot by a spectator (thanks Doug Murray).