I just tried to start an EC2 instance that was laying there for a while.
Well, it refuses to come back up.
Luckily, I have a recent snapshot of this server so instead of trying to figure out how to deal with it, I can just create a new one and attach the snapshot.
So if you are reading this, just take 2 minutes to create snapshots and backup your ec2 Instances. Can save you tons of time and frustration later.