GMC 2001 Safari Owner's Manual page 60

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 your arms.
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