Ennis went down to the ice for all of two seconds and was back in the play. I honestly thought they were bringing the stretcher out for richards. Then he's back out next shift. I think us as Buffalo fans have a problem with how much richards over sold the hit. Not a dive just oversold the aftermath.
He wasn't out next shift, he went to the locker room.
I haven't seen Richards "fake" an injury before. It's honestly more reasonable that he was in pain and stunned since he did just go headfirst into the boards, than him faking injury.
As for the hit on Ennis, it was penalty worthy and I think the right thing was called, but in my opinion Girardi was trying to hit him shoulder to shoulder and knock him off the puck in the corner. You can see him setting up for the hit while Ennis was still skating along the boards, and then throws it as Ennis turns. It was bad timing by Girardi, he probably thought he could knock Ennis off the puck before he got a chance to make a play with it, but misjudged and ended up hitting Ennis in the back. Penalty worth but in my mind there's a difference between something like that and shoving a guy in the back the way Kaleta did. Girardi was at least trying to make a legitimate play, Kaleta was doing nothing but shoving a guy into the boards from a dangerous position