Silverstein - Smile In Your Sleep
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From 1:56 to 2:22: Possibly my favorite breakdown. Not very complex but it makes me want to thrash my bedroom every time I hear it.
I can't find the video for it but here is a link: Roses Are Red - I Felt I Knew Her.
Starts to break down at the 2:10 mark and lasts for exactly one minute. Some people don't like this song but the breakdown itself can be appreciated by everyone.