Yesterday I wrote that I was feeling comfortable taking on NPC cruisers in Eve Online with my Rifter. Then I did a mission and discovered that the "boss" NPC cruisers are a LOT nastier customers than the trash cruisers that were in my way through the first four missions of the story line and the first three rooms of the instance. Oh, I managed to kill the boss cruiser, but not until I lost half my structure and was trailing flame.
The lesson from this? Never feel complacent in Eve. Never.