turn around and (do something)
To suddenly do something that is unexpected and often undesired. I was expecting a slap on the wrist or something for making such an inappropriate joke, but then they turned around and fired me! I was so shaken after she turned around and shouted at me during dinner.
turn round/around and do something
(informal) say or do something unexpected and unfair: He just turned round and told her that he was leaving. She couldn’t believe it.