Answer:
It can be hard for some people because some people have social anxiety or some other type of mental illness. Some people may be scared to stand up for someone and just try to blend in like any other person.
When comparing the man's legs to rubber in context, it sounds like he is unable to walk. Describing his legs as rubber would indicate they bent and bowed under his weight on them. He's probably either injured or lame.
Answer:
Sally had a euphoric feeling about life.
My mood yesterday was euphoric.
