For all we know the DP really is a complete amateur who has no idea what to do on a serious big-budget film set, and McG is a worthless pussy with no control over his crew (looking at both their resumes and the evidence in the clip, this is probably a safe assumption too). This is likely just the straw that broke the camel's back, and I even read something from the Assistant director on the film already that it was just a particularly bad day for everyone. Yeah, The Bale went a bit overboard, but did you hear McG in the background? Fucking guy doesn't have a clue what's going on. It's totally understandable.