请大家帮忙看下这段：
Crutches are for when you break a leg. Then the doctor puts it in a big white cast with just your piggies sticking out. And you can't walk on it. And so she gives you crutches to swing yoursel.
主要是加粗的部分，不太理解，到底是说的啥意思啊，请帮忙解释一下，谢谢了。
您好，还有一句： And also the head doesn't get broken off your mother's bird statue. Which used to be a blue jay, I think.
这里怎么解释呢，是骂人的话么？blue jay是mother's bird statue的意思吗？ 麻烦您了~
