The Mysterious Room
Riddle: A man is in a dark room where he is warm and safe from the outside, but he really wants to go outside even though he knows he might die if he goes outside. In the end he breaks down the wall and falls outside and almost dies. What was so bad inside the room?
Answer: The dark room was a shark and the man had been eaten by the shark. The shark was filled with acid and so that was the bad thing inside the shark. It was better to go outside and maybe drown than stay in the shark and be disolved into food.
Source: https://www.riddles.com/index.php/8713
