Pontiac Solstice 2008 Owner's Manual page 30

CAUTION:
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People should never hold an infant in their
arms while riding in a vehicle. An infant does
not weigh much — until a crash. During a
crash an infant 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)
infant will suddenly become a 240 lb (110 kg)
force on a person's arms. An infant should
be secured in an appropriate restraint.
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