LorgSkyegon

Answer: She's not angry. She realises how serious the situation is, and is considering the difficult task Dumbledore has suggested he wants her and Harry to do.

raywest

Not to mention that what Dumbledore is suggesting is illegal under wizarding law and highly dangerous. She knows what could happen legally and physically if problems arise.

LorgSkyegon

Answer: Ron's shoes that were taken off him when he was put into the bed. That's why they disappear when Harry and Hermione go back in time. If you play it in slowmo, you can see it when they disappear.

lionhead

Why were they taken off him? Pomfrey could still fix his leg if they were on.

Probably because it's simply more comfortable. Odds are good he would be spending the night in the hospital wing, so he wouldn't wear them to sleep.

LorgSkyegon