Ok real talk here for a minute. If, by any chance, some dufus has put a lightbulb in their month and need help removing it, grab a sturdy cloth towel, pass it into their mouth through the corners and gently wrap the glass part of the lightbulb in the cloth. When you’re done, all corners of the cloth should be hanging outside persons mouth. Their teeth should not touch the glass directly - only through the cloth. This way when the glass breaks, all the pieces will be contained I the cloth for an easy and, if you are careful, harmless removal.
The safest way to crack the bulb once you’ve wrapped it in cloth is to GENTLY tap the bottom jaw - imagine a 4 year-old landing an uppercut. The glass is very thin and cracks easily, - no need for much force.
Of course, better not get into such a situation in the first place. Stay safe, folks!