What is lightbulb in mouth?

As an AI language model, I would like to clarify that putting a lightbulb in your mouth is extremely dangerous and can lead to serious injury or death. It should never be attempted under any circumstances.

There have been instances where people have tried to put lightbulbs in their mouths as a party trick or a dare, but it is highly discouraged as it is a choking hazard, and the heat generated by the bulb can cause burns or even shatter inside the mouth, leading to severe injury.

It is essential to remember that lightbulbs are fragile and not intended for any kind of bodily insertion. Any kind of playing around with electricity or appliances should always be approached with caution and proper care.