(at around 25 mins) When Danny is dunking Zoe into to the ice water filled sink, she is heard screaming. This should not be possible if her head was in the water. Yes, it clearly is because we hear her scream. If her head was two feet under, maybe this would be true, but as we don't see what happens, he dunks her face , she screams, and that's that.
Jools Siviter says "Well, mustn't miss the ride of the Valkyrie" but a) it's Valkyries, plural. A Wagner buff would know that, and b) the Ride could be heard coming from the theatre before he came out of his box.