I can't understand why she would allow him to behave that way. I would never in a million years be laughing if my horse was bucking around me in circles, that's just not allowed.
On the other hand, if I were him I'd be over the moon seeing grass too if all I got was a tiny sand run out.
I know Beverley is sure excited to be turned out in her paddock, she flails about like that guy when he went in his paddock in the second video - but she's just a baby only excited to go out and see her buddies. She gets a large grass field every second day, the medium paddock is only a couple times a week when the field is soggy but she's still stoked to go out in there even though it's every day lol. If she ever acts out while I am leading her she gets a good talking to! She's totally aloud to be excited once she's loose in her field, that's fine, but until I have gone that's never okay. I don't get how that girl thinks it's funny? And if it's so funny, maybe she should actually be turning her horse out. Just my two cents.