I am extremely fond of "Psych"; also, I am a serious fan of the (undefeated!) Memphis Hustlin' Rollers. So I was delighted to see that there would be an episode that revolved around Women's Flat Track Roller Derby. There were some things they stretched or invented for the sake of the plot; other things they got right. The one thing they absolutely should not have done was have O'Hara hit another skater in the face and continue to skate in the bout (as well as brag about the hit later). That's a serious foul and she would have been automatically expelled from the bout. If Shawn had gone undercover as a minor league baseball pitcher (no more unrealistic than an untrained, inexperienced O'Hara going uncover as a Derby skater), I cannot imagine that he would have been allowed to deliberately hit the batter.