Neither of these hens are harmed. They are just silly.
There is no need to run at her waving your arms and shrieking "HEN DOWN! HEN DOWN! MEDIC!!!!"
She's just fine... she's goosin' around in the sun trying to get the maximum sun exposure. They all do it. And if she is violently twitching all around... probably just a dust bath. Just go on about your business.. no need for alarm.
That is all.
This has been a Public Service Announcement by the Hysterical Hen Owners Association.