Packing brains
This instructions on how to pack a fresh human brain for shipment are clearly wrong:
Put the fresh brain (A) in the first ziploc bag.
Ziploc first bag (B).
Place bag (B) in second bag and ziploc it (C).
Place 0.5 kg of wet ice into the bucket and transfer the double-bagged brain onto the ice (D).
Cover double-bagged brain with wet ice (E) and tightly fit the lid on the bucket.
Ziploc first bag (B).
Place bag (B) in second bag and ziploc it (C).
Place 0.5 kg of wet ice into the bucket and transfer the double-bagged brain onto the ice (D).
Cover double-bagged brain with wet ice (E) and tightly fit the lid on the bucket.
Anybody knows that packing brains that way will result in mushy, squished, bruised brains. You have to surround them with soft and yielding material, and then a layer of stronger supporting one.
Otherwise your zombies come out all dumb.