If the Avengers failed, the "kill-em-with-cuteness" approach was all SHIELD had left.

It's almost Shark Week on Discovery Channel, and it turns out one fishy Mythbusters experiment could have ended up a furry mess. Adam Savage and Jamie Hyneman explain how the team almost tapped a real dog for shark bait, which definitely would have gone over well in PETA's San Francisco office.

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