Dad Holds "Say No" Sign As Daughter's BF Proposes!

Was this a practical joke? Or did this dad steal his daughter's thunder? A young woman thought she was going to lunch with her family, and was not expecting a surprise wedding proposal in the desert from her boyfriend. Neither was she expecting her dad to be holding up a sign that read, "Say No"! Apparently it was all a joke. But was it funny? And did it take away from a special moment?