The hopeful man got down on one knee at the Lights All Night festival in Dallas Texas, and invited his intended up on stage.
He told her: “Indie, I love you with all my heart. Will you marry me?”
The girl – scantily clad in fishnets and a basque – looked shocked as she walked towards him and the lightswent up.
But no sooner had he popped the question than his hapless girlfriend toppled back into the audience through a hole on the set.
Luckily she wasn't hurt and after being helped back onto the stage she accepted the proposal.
Her boyfriend looked worried as she dusted herself off and walked towards him but he held out the ring in hope.
The MC asked: Did she say yes? Did she say yes?”
Then the crowd went crazy as he yelled: “She said Yes!”