So, I just bought minecraft and didn't know about hostil mobs yet. So I had built a small house and got a few supplies by the time night rolled around. First, I got shot by skeletons, then I got killed by a zombie. When I respawned and went home, a creeper started following me. Being the noob I was (or am) I thought it was a strange pet like a dog, so I led it into my house. Boom. I played on creative untill I learned about all the mobs after that. XD