I came across a video about Gif with sound on YouTube. I had not seen any videos of this kind before. But the video was very interesting and I learned a new idiom from an embedded song from Scissor Sisters in the video.
According to the Cambridge online dictionary, hang one's head means to be ashamed or unhappy.
In my diary, I have written this sentence,
I saw her crying alone in the school lavatory on second floor yesterday.
Now I want to rewrite it this way, but I don't know whether it is correct:
I saw her hang her head crying alone in the school lavatory on second floor yesterday.