I'm glad the cats are ok. My RB cat, Leroy did something very similar. I have a gas range. One day I went into the kitchen and smelled gas. He has stepped on one of the knobs on the range, turning it just enough to turn the gas on, but not enough to light the burner. Ever since, I take the knobs off. I just pop them back on when I use the range. Even though he has been gone for over a year, the others may have learned his trick. I'd rather be safe than sorry.

Maybe there is just something about our Kansas cats!