Such abrupt transitions are almost inaccessible to "ordinary mortals." It's unlikely. Even such a miracle as with Albert happens quite rarely.
This is great luck; you could say he's some kind of extraordinary personality. Usually, slipping between worlds happens so slowly that we don't even notice the changes. :rolleyes:
It's also possible that he has some kind of mission here. Something like "stop Merlin" or, conversely, "mobilize Merlin." But that's just speculation.