Mouth full.

mom has a friend who is a teeth surgeon/dentist. and she told mom that there's many cases where she had to take pencil, chopstick or light bulb from someones mouth. (many cause to her is now quite common)

it happens when people are usually writing, or when people bite the end tip of their pen or pencil, and someone comes from the back without realizing the person has got a pencil in their mouth, pushes their head down just for fun. and the pencil gets stuck from the mouth right up till their nose.
the chopstick one also something like that but ended up near the brain or something. so had to open up the skull to take out the chopstick.

the light bulb is the worst. don't know why did the kid put the light bulb in his mouth, the light bulb shattered inside. so my mom's friend had to take out the pieces of light bulbs. but everytime pull one piece sure bleed alot. the kid died.

i will now not touch/push people's head. especially from behind.
and i hope after you read this you also won't do that to people anymore. so scary.