If this Herald on Sunday report is to be believed, officers involved in the raid on the house of overweight internet geek Kim Dotcom behaved as if they were auditioning for roles in a Hollywood action film.
An alternative explanation is that they were expecting to have to confront a team of trained killer-jihad-suicide-ninjas, and decided to take no chances.
Another possibility is that they got so aroused while playing with their toys (helicopters! guns!) that they forgot to behave the way we expect our law enforcement officials to behave: with restraint, humility and commonsense, and in a manner commensurate with the presumption of innocence.