It's ok to do something out of the ordinary every once in a while contrary to popular belief. Whether it will be embarrasing or not is likely to depend on various factors...such as self esteem, others reaction to it ect. Don't really think those things you mention would be that terribly out of control...though might not want to run around if you're inside(can be dangerous, so perhaps save it for outside)...As for dancing around i listen to a lot of metal and rock and might end up rocking out a little in public if I have headphones in or there happens to be music I like where I am, can't help it don't think It's that unusual.

Honestly unless you are having urges to do something that could hurt you or others then its probably not any kind of mental illness sign or anything to worry about. But yeah I think also if you're maybe not expressing yourself it creates some pent up energy so can give you the urge to just let it all out, out of nowhere....kind of like if somethings bothering you and you try and suppress it then if something upsets you it might be hard not to let all that out to.