If you had played
@PND OmegaK 's Dragon Breath Bo Rai' Cho, you would know why.
If you get cornered, Bo will jump out/dash backward to do the fart to prevent you from getting out of there with jumping, so he just rushes down to do the next combo. What's worse, he has the flaming floor as DOT to punish you even more.
Ice Klone is useless against his flame breaths. His fart acts like Sub Zero's Ice Klone to keep him safe. You'll want to get centered as long as possible to stay out of the corner. If you find the chance to freeze him in center, throw him to the corner, and keep zero point klone in check to prevent him from charging out of there. GM is worst only in center, so...
edit: forgot to add the sumo stomp. Not only it destroys IK, but also forces you to restand from being down.