'To pull a face' is an idiomatic expression.

'To pull a face'──'愁眉苦脸'是一习惯表达法。

He was really depressed about the business last week, but he’s all smiles now.A very big order has just come in.

期他还为生意愁眉苦脸的,可是现在卻喜形于色,因为接到一笔大订单。