a weird thing happens to me

[Rachael]

I am worried about a weird thing that happen only when I do Urdhva Dhanurasana, Whenever I start to extend I hear my chest makes a cracking sound, I don't know what it is? I'm so much tensed. I'm also on verge of giving backbends until I get to a teacher. It happens in my lower back.
Any comments?

Rachael

[cyril]

Yoga is really very good for health, as it heals your every health problem. It may be due to any weakness in the body that is being worked out, and cracking is usually when things are loosening up. Don't worry and follow any yoga teacher.

Cyril