Answer:
Well this is supposed to be about a challenge YOU faced, but I suppose I can list an example. ;)
A few years back, I had a hamster, a very cute one at that, and one night, I woke up and found her missing from her original spot on my bed. Earlier that night, I had picked her up from inside her cage, and placed her on my bed. She was a little tired and drowsy, so I thought maybe I should admire her soft snores, and cute, chubby face while she was sleeping. Unfortunately, I also fell asleep moments later. However, my father happened to spot her running down the halls in my house. I wasn't awake at the time, but I assume she jumped off my bed, and crawled out my door. If I were to go back, I'd tell myself not to sleep when your hamster is not in their cage, especially when hardly anyone is awake in your house. Thank you, dad. ;-)