冒金星

tā dāng tóu ái le yī jī yǎn jing zhí mào jīn xīng

他当头挨了一击，眼睛直冒金星。

The blow on head made him see stars.

yī shàn xuán zhuǎn mén zhuàng de wǒ mào jīn xīng

一扇旋转门撞得我冒金星。

A swinging door hit me and I really saw stars.