A coma is a
state of prolonged unconsciousness, which can be caused by one of many, many things. Many
people believe that even if a person is in a coma, s/he can
still hear you if you speak to him/her.
"Hey there, Grandma. I
hope you wake up from that dreadful coma soon. I miss your
cooking--"
*Nurse leaves*
"I'm going to spray some whipped
cream up your asshole, and THERE'S NOTHING YOU CAN DO ABOUT IT! Haw haw haw!"