. '' `` He did n't get cut , '' Carano clarified , before adding , `` maybe a little bit . '' McGregor , for his part , said he also emerged `` sore '' from his scenes with Carano but called the fight scenes `` good fun . '' But Tatum , whom she describes as `` like a bro , '' is one actor Carano says she would n't want to fight in real life . `` I 'd probably want to choke him out real quick , '' she said . `` Because he 's actually very athletic . '' Return to MMA ? Carano has officially retired from MMA but says she has n't ruled out a return . To prepare for the role as a Black Ops agent in `` Haywire , '' she worked with a Hollywood stunt crew and attended a two-month training camp with a former Israeli intelligence operative . According to Soderbergh , it was his intention to have Carano -- who is a 5-feet 8-inches tall and 143 pounds . -- rather than one of her male costars , be the toughest character in the film . `` There
-LRB- PEOPLE.com -RRB- -- Do n't mess with Gina ! That 's the lesson Gina Carano 's costars learned while they were filming Steven Soderbergh 's `` Haywire . '' After all , Carano is n't just another new face in a Hollywood action thriller . She 's a former mixed martial arts star , who is making her movie debut in Soderbergh 's latest flick , which opens Friday . `` I got to be physical with some of the hottest guys in Hollywood , '' Carano , who tussles with Channing Tatum , Ewan McGregor and Michael Fassbender in the film , told PEOPLE at the BlackBerry-sponsored Cinema Society screening this week . Fassbender , in particular , was the recipient of a vase to the face when the two were filming a fight scene and he accidentally KO 'd Carano . `` When Fassbender slammed my head into the wall , that 's the only time I went black , '' Carano , 29 , said about the shoot , during which she also reportedly knocked out a stuntman . `` And then I slammed a vase right into his face when he was n't expecting it