Testing on hybrid vehicles reveals strong electromagnetic fields which some scientists associate with a number of health risks, including an increased risk of cancer.

These risks may be eclipsed by the more immediate risk of electrocution, if a spark is ignited. Maintenance or repair work on hybrids requires specially trained mechanics.

In the event of an accident, some are concerned that a spark could be caused by forced entry from the jaws of life, some consider this an urban myth. Manual info states that once the "switch" is thrown, there should be no power in the engine bay, however, there is no safe way to test for power in the engine bay, since a slip of the wrench could lead to arcing and burns or electrocution.

So...if you have a hybrid, make sure you read all the safety info!

For more info:

Hybridcars.com
KBMT12.com
aa1car.com
MotorAuthority.com
SceneOfTheAccident.org

Image source: endgadget.com