Guānzhòng men bèi zhège xiǎopǐn dòu de qiányǎng-hòuhé.
The audience was in stitches from the comedy sketch.
Tips
usage
Almost always used with 笑得 ('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.