We've had a few over here.

If for instance, Lily is playing with something she is not meant to, i'll either say 'no' quite a few times or take it off her if she were in danger and she'll start screaming and flapping her arms up and down and she gets really angry and if i try to pick her up she just keeps flapping her arms about and hits us(not intentionaly) I seriously did not think we'd be getting this until another year, but there you go!