If you needed any more proof that dogs can be man's best friend, this video may be all you need A man is swimming in a lake and submerged himself under water while his dog was on land. When the man goes under water the dog leaps into action and jumps in the water to rescue him, even though the man doesn't need saving. The dog grabs his owner by the arm and pulls him all the way to land.

While the owner may not have needed saving, the dog gets an 'A' for effort.

Watch the cute moment below.

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