The doctor's right suspender keeps moving from near the shoulder to near where it normally sits from approx 36:24-37:27
At the end of the episode with the clock, it's 11.59 am and then changes to 12.00pm and the date changes to the 6/26. It should have changed from pm to am.
In 'Blink' it is established that if the Angels look at each other, they remain frozen. This is why they always cover their eyes. However, here, they can move (even in their stone form) while other Angels are looking at them.
The Doctor says that if Amy opens her eyes for more than a second the angel will take her over but when she opens her eyes to see the light, she does it for at least 5 seconds. According to The Doctor, she should be dead by that time.