It's a clichè that is constantly repeated by the likes of Gordon Ramsey:
You are running around like headless chickens!
Also, for example, they do in South Park animations
Do headless chicken run around? After all, why wouldn't they collapse?
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Yes they do, or at least kind of do.
They move after decapitation in a kind of jumping-running-flapping motion, and can be seen in the videos getting out of containers, or traveling several dozen meters away.
Searching for "headless chickens run around" gives a bunch of YouTube videos. All depicting decapitated chickens running around, flapping their wings and jumping. Here are some examples:
Caution: NSFW. Contains graphic content.
Yes, they are running around, until they dead.
Here is a story of Mike. A chicken refused to dead after beheaded.
Seventy years ago, a farmer beheaded a chicken in Colorado, and it refused to die. Mike, as the bird became known, survived for 18 months and became famous. But how did he live without a head for so long, asks Chris Stokel-Walker.