What is the sound my gas stove makes?

My gas burners work fine, but my gas oven will (80 percent of the time) make a very loud POOF noise and then a loud whooshing sound (like air) comes and doesn't stop until I turn it off...and I immediately turn off the oven when this happens. My gas guy had no ideas except that it was not normal (and probably not good). Any ideas? And any ideas whose end the problem is on...gas or stove? It's a Kenmore.

katyd
May 2010