Chevrolet Impala 2007 Owner's Manual page 44

CAUTION:
{
People should never hold a baby in their
arms while riding in a vehicle. A baby
does not weigh much — until a crash.
During a crash a baby will become so
heavy it is not possible to hold it.
For example, in a crash at only
25 mph (40 km/h), a 12 lb (5.5 kg) baby
will suddenly become a 240 lb (110 kg)
force on a person's arms. A baby should
be secured in an appropriate restraint.
44