I did this the other day to get Jax's mane off of his neck for neck reining... I used a ponytail in the middle of it to keep it from falling out (and messed up the braid in doing so), so it's not the best but it did it's job! :)
My first attempt at a running braid...well half of a running braid lol. My gelding came to me missing a chunk of his mane so I only got about half way haha.
I tried playing around with my young paints mane just to get him to stand longer in the cross ties. Here's what is was supposed to look like.
Here's what it looked like. I did another two rows the next day, but didn't take a pic. He has always hated me playing around and combing his mane so it was good for his patience.