He may be forced by the bit to walk backwards

<h2>He may be forced by the bit to walk backwards</h2><br>
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<p>Then is the time to get him into a comfortable position for lying down;
if he is still stout, he may be forced by the bit to walk backwards.
Then, too, by pushing gently at his shoulder, or by pulling steadily the
off-rein, you can get him to fall, in the one case on the near side, on
the other on the off side; but this assistance should be so slight that
the horse must not be able to resist it. The horse will often make a
final spring when you think he is quite beaten; but, at any rate, at
length he slides over, and lies down, panting and exhausted, on his
side. If he is full of corn and well bred, take advantage of the moment
to tie up the off fore-leg to the surcingle, as securely as the other,
in a slip loop knot.</p>


Fonte: Tamming Horses