I was proposed to, once...and I thought it was a joke. I started laughing really hard, which I guess wasn't the reaction he was looking for...the relationship ended soon after that (to be clear, I had thought I had made my stance on marriage pretty clear--it was *not* something I was interested in, with him, or anyone). At least he was smart enough not to ask me in public.
I feel bad for this guy, but given her expression, I'm willing to be he should have known better!