【谈虎色变】〖tán h sè biàn〗[turn pale at the mention of a tiger; become jittery at the mention of sth. frightful; become pale even at the mention of the name of; turn pale at the mere mention of sth. terrible]

谈空说幻遇险境，

虎口余生活侥幸。

色若死灰心余悸，

变危为安担惊恐。