I have had my fair share of incidents with monkeys in Southeast Asia

years ago I traveled in Southeast Asia with my then girlfriend-now wife
on numerous occasions we had encounters with monkeys in the national parks and wildlife preserves that started nice
then turned when the monkeys did not get what they wanted

the monkey is fast and smart
if they want something.... they will take it

jaws like wolves 
agility like a spider
man is no match for the monkey
well... without tools

image and story here

which reminds me of the men on the beaches of Java flying kites with fish hooks on the strings
snagging bats from the sky at sunset