From Olympia, Mo.: A 76-year-old man's accident involved a bulldozer rolling over his legs. Firefighters responded to stabilize the machine and free him. The incident occurred when the man was driving up an embankment and the seat broke loose, causing him to fall.

The man's legs were pinned under the bulldozer's tracks. His condition improved after being helped by emergency responders.

Further details about the accident are available from the source, including the role of the fuel cell in stopping the bulldozer from moving further.