Come on,don't freak out!别慌啊
freak out极度兴奋；疯了；颓废；吓坏了；行为异常
We freaked out when we won the lottery.
中了奖券,我们兴奋极了。
This ordinary quiet guy just freaked out and shot ten people.
这个平时温和的家伙简直发疯了，开枪打死了十个人。

People get arrested for this,mitchell!We have to keep her calm.人们会因为这个被捕的 ， 要让她保持平静啊
get arrested被拘捕
Nobody ever got arrested for bending the law.
在没有违法的情况下搞些小欺骗是不会被捕的。
My brother just got arrested for robbing store.
我的兄弟因为偷盗商店而被被捕了。

keep calm保持冷静
You should keep calm even in face of danger.
即使面临危险，你也应当保持镇静。
Tell him to keep calm and not to crowd the mourners.
叫他保持冷静，不要操之过急。