I have this vision of the challot continuing to grow, developing appendages, pushing the oven door open, and running wild. :-)

Try using cooking spray on the pan.

BTW, I got a new honey-cake recipe this year that appears to have worked well. (The test will be tonight.) I made it in loaf pans, not a bundt pan, but I didn't need to do any greasing. Remind me after Yom Tov/Shabbat and I'll send it to you if you like. (That is, assuming it tastes as good as it smelled.)