I hit a rock...now my mower won't start" - How to fix it - YouTube
Consumer Tips: Play it Safe with Yard Maintenance
MythBusters: Lethal Lawnmower MiniMyth | We're not posting this to bum you out about yard duties. We care about safety - should you be careful about rocks before you mow? The MythBusters
Outdoor Power Equipment Institute Issues Key Equipment Safety and Maintenance Best Practices
Rock thrown 72 feet from lawnmower puts boy in coma - YouTube
Lawn Mower Safety - HealthyChildren.org
Protecting windows from lawn mower chips? - DoItYourself.com Community Forums
Lawn Mowing Tips: How to Mow a Lawn the Right Way
The Dangers of Riding Lawn Mowers | Slack Davis Sanger LLP