I heared a very funny comedian the other day.
He says the following:
This pest control guy from Durban gets called to a house for a Rat problem.
Owner of the house: So how do you kill these rats ?
Pest Control: Looks like u don't under stand the Pest control Business Larney,
You catch the rats and when Business is bad you release them again, Come to think of it I think the police copied our idea !