ok. thanks for your advice.
man, i feel so stupid. it was a drop of water from my hands, and i was just being careless. i couldn't believe how it happened. it was like slow motion watching that single drop fall, then touch the glass, and quickly shatter it like thin ice breaking on a pond.
thank goodness there's 3 panes of glass, well, 2 now. perhaps i can get away with just those 2?
well, i needed another oven anyway because we remodeled our kitichen. problem is, my wife probably wont let me experiment with this new oven. i guess i gotta start using the charcoal grill!!