Guys.... he has a nipple on the intake manifold. I'm no expert, but I don't beleive this is terribly uncommon. You can see the same setup in the Magnum 120 manual. Look and see. I have an old OS Surpass 120 that is setup similarly, and it has a breather return tube that connects the case vent to the intake manifold.

If the crankcase breather is vented to the atmosphere, then the nipple on the intake will have to be sealed. For example, by sticking a plugged length of fuel tubing over it.

They return the junk to the engine so that the mess gets routed out via the exhaust. I have no idea whether that is good, bad, or of no difference.... but that's why it is AFAIK!