Dogs can be very protective when they think someone is attempting to take something important away from them. These dogs are so protective, many of them make some insanely funny noises doing it.

I think some of these dogs are insanely overprotective. There's also the possibility the person or other animal provoking them is insane. At this point, there's probably a very fine line between the wacky growling noises and a good strong bite.

With that being said, part two of this video should be of the insanely funny noises made by those who got bit.