I guess the difference looks to be the immediacy of his pain, both Millar and Belloumi could continue for a while. Fingers crossed it's not as bad.
30 seconds is a short period, or are you looking for an argument on the definition of what a short period is???
I've seen what an ACL typically looks like, which is a change of direction, twisting motion. ACL's typically snap from that sort of impact - and my mother has suffered a bad ACL if firsthand experience is required to offer an opinion - Barry looked like he jarred his knee in an impact with the ground. Which could still be a ligament issue, but if it's an ACL it'd be incredibly unlucky. I know we've had two this season which leads to a natural pessimism, but not every knee injury is an ACL.