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 :)