I've had the idea for this kind of gag ever since I came up with the Zombie-man idea.
If you recall, everything that George has done as Zombie-man has been without John. But, John has known about it as George isn't as clever as he thinks... Plus Zoey would have spilled the beans when she came up to get gloves and stuff to gather George's bits from when he hit the ground and exploded into several pieces last Wednesday
While I was sketching this strip out, I came up with the idea for a one-off that I'll do this week. If I can come up with another I'll be able to start the next arc on a Monday, which I prefer to do. So if you have fingers, cross them.