Can-Am outlander 400 series Operator's Manual page 42

WARNING
POTENTIAL HAZARD
Improperly operating in reverse.
WHAT CAN HAPPEN
You could hit an obstacle or person behind the vehicle, resulting in serious
injury.
HOW TO AVOID THE HAZARD
When you select reverse gear, make sure there are no obstacles or people
behind the vehicle. When it is safe to proceed, go slowly. On 2-UP models,
take account that the passenger can obstruct your view.
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40 SAFETY INFORMATION