To traditionally pull the mane
Tie your horse up. And give him a hay net to keep him occupied. Begin by combing the mane through with the mane comb. Start from the bottom of the mane, at the horses withers, as they tend to be less sensitive here. Slowly work your way up. Then with one hand, take a small section of mane.
And with the other, holding the mane comb, begin to back comb that section, upwards, two or three times. Hold on to a few strands of the longer hairs. Twist the remaining hair around the mane comb, roughly one and a half times. Pull down quickly and sharply, to pull the hairs out. Repeat all the way up the mane.