Pontiac 2002 Firebird - Manual (Page 39)

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CAUTION:
People should never hold a baby in their arms
while riding in a vehicle. A baby doesn’t 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.