It's just such a bizarre thing to happen. The only thing that makes me think it may have been an accident is the ref should have thrown a flag on him just being out there. Also, it seems like if you're out there in the way the other team is most likely just going to run you over. If that happens the Ravens get a free td and you just got ran over.
He would have to know the refs would be stupid and not flag him and that the Ravens player would cut inside instead of taking the free shot. I'm thinking he screwed up and was smiling when he realized his screw up helped his team. There's too many scenarios where what he did screws his team and just the 1 where it works out.