Sometimes it’s easy to figure out when it’s time to rip. Like when you look down at the scarf you’re knitting, the long edges of which should (in theory) lie parallel, and you see this:
Bad cafe cameraphone picture aside, I think it’s pretty clear that this scarf has gone completely off the rails.
As a challenge to your knitting and spatial logic skills, I ask you to put on your Knitting CSI hat and deduce what happened. I’ll put the answer in the comments.