Grandpa-to-be has hilarious reaction to pregnancy announcement

DETROIT – Using a bit from the "Tonight Show," a couple used the "Whisper Challenge" to break the big news to their parents that they're going to be grandparents.

The excited grandpa-to-be is featured in a viral video trying to guess what the couple is saying to him, while he wears headphones. Of course, the grandma-to-be got it right away.

At first he thought he was going to the beach -- but after he figured it out -- the excitement was overwhelming. Watch the video below or here.

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