In Australia torn money are valued by the percentage of the banknote remaining. Half of a $20 bill is valued at $10. Banknotes must be greater than 20% of the original size to have any value. If a banknote is 80% or greater in size it is worth the full value.
The city of Churchill in Manitoba, Canda, uses helicopters and armed volunteers to surround the city and defend it from Polar bears during Halloween trick or treat night. Noise markers, rubber bullets and even bear traps are used.