This happened at our bridal store.
Bridezilla came in with fiance, and flipped shit about how the bridesmaid dresses weren't the exact same color as the tablecloths they had picked out.
The store had stressed to her that the photo online wasn't totally accurate, she ignored them and ordered that color anyway.
In the middle of her scream fest, the fiance held up his hand and said, "Stop."
Bridezilla stopped dead.
Fiance: "You made the photographer cry, you screamed at the caterer, and (insert another example here I forget)."
She starts screaming at him too and he just sat there, calm and patient and then he said, "Give me the ring."
Her: [Shock and rage] "WHAAATTT?!"
Fiance: "I've had enough. Give me the the ring."
She chucked the ring at him. He calmly picked it up and walked out, leaving her there like a complete fool. She just sat there for several minutes in stunned silence, then stormed out the door. We saw her on her cell phone, blubbering to somebody to come get her, as her fiance left her at the store.