How can I convince my mom to let me crowd surf?

I really want to crowd surf this year at Warped Tour! She is so against it and I want to warm her up to the idea. I've done it before when I saw this hardcore/screamo band Asking Alexandria and she doesn't know about it. Warped Tour is July 20, which is also my birthday. Should I see if she'll let me do it as a birthday gift? And should I go with the "I want to live with no regrets" type thing? Thanks :)