Card 23 of 82
An Open Door
When Martin woke up that morning, he was surprised to see the door open. As soon as he crossed the threshold, he was beheaded.
Solution: Martin was a canary who had lived in his cage for four months. Sylvester, a cat, had been waiting for a chance to catch him. When their owner accidentally left the cage door open, Martin flew out and Sylvester bit off his little head.