Apparently he jumped from a burning plane and landed in some guy's lilac bush. I couldn't find an online copy of the probable cause report, but the following sources outline the gist of the accident.
http://www.nytimes.com/1987/10/15/us/2-die-in-plane-crash-man-jumps-and-lives.html
http://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001213X32402&key=1
http://www.ntsb.gov/safety/safety-recs/recletters/A88_147_152.pdf
http://www.nytimes.com/1987/10/15/us/2-die-in-plane-crash-man-jumps-and-lives.html
http://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001213X32402&key=1
http://www.ntsb.gov/safety/safety-recs/recletters/A88_147_152.pdf