You can see footage of the accident, apparently people like to slow it down to see if you can see Morrow's head come off. Gross. It's from the Faces Of Death series and it's set to sickly music.
It's also allegedly difficult to hunt down the location where it happened. I read about that on findadeath.com though.
Vic Morrow is Jennifer Jason Leigh's dad. They didn't get along, apparently, and Leigh would have just been getting fame because of Fast Times At Ridgemont High, released right at the same time as the incident.
Landis gets up and walks away from interviews, apparently, if anyone asks him about it. The aftermath was apparently handled sort of like Sheryl Crow handled the Kevin Gilbert thing. It didn't really stop Landis's career, obviously--that'd be something more like Blues Brothers 2000 that did that. I didn't know he did a film in 2010.