Guānzhòng men bèi zhège xiǎopǐn dòu de qiányǎnghòuhé.
The audience was in stitches from the comedy sketch.
Tips
usage
Almost always used with 笑得 (xiào de, 'laughed so hard that…'). It's the go-to idiom for describing someone laughing uncontrollably — you'll see it constantly in descriptions of comedy shows and 春晚 (Spring Festival Gala) sketches.