Place this clip at the start of a birthday montage, before the photos and messages roll in. Follow it with a yaaaaaaaay cheer sound button for the group reaction, then cut to your own recorded greeting so the joke opens the sequence instead of closing it.
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This is a short voice clip of a Frankenstein-style monster character singing 'happy birthday' with a goofy dananana intro, then asking if you want him to drop some lightning or something. The drawn-out monster delivery makes it feel silly and delightfully awkward, like a horror character trying to be festive and getting the tone completely wrong in a funny way.