"Well, only when the other option is worse?" You only do that when you have a very good reason to do it. She isn't insane. She just knows that sometimes you need to jump really high to escape an enemy.

Although the air around Chandra was decidedly warmer than it was when she climbed up, this guy is very angry and it's kinda rubbing Chandra the wrong way, "Hey! I haven't said a thing about your weird inhuman bits, don't get all angry about my magic."

Chandra wasn't on fire... yet.