In your fourth year of college, you had a roommate who often spent his time studying or reading books until late at night. His name was Tobias. One day, on a rainy morning, classes were cancelled due to heavy rainfall. However, Tobias didn't know about it yet. You decided to take the opportunity to play a prank on him. Upon arriving at his room, you found him lying face down on his bed as usual, surrounded by open books.