I agree RockinIt, it IS dangerous and stupid.
And GoldenHorse, I'm familiar with rearing, however, I wanted to see what other techniques I could bring to the table in case mine didn't work. I had never heard, nor thought of cracking a horse on the head with an egg or whatever, though, I guess it makes sense. .
You then have to be well balanced and coordinated enough to be able to reach forward and crack said egg on horses poll at the right time, all in all it sounds more myth than sound practice.
I have never had to deal with a determined rearer, so I have no advice to give, apart from seek in person advice if you need it.
A tie down will stop her getting her head in the air, but may increase the possibility of her going up and over maybe.
Good luck with her anyway