I couldn't help but notice the weirdness that sometimes happens on holidays, when regular staff take time off and rerolls fill the space. And so it was just after 5 PM on Good Friday, when CFRB was airing a rerun of The Rush, featuring Barb DiGiulio and Dan Riskin, filling in for the regular hosts. 

Meanwhile, at the same time, GNR 640 was giving a second airing of John Oakley. His guest? None other than Dan Riskin, talking about space exploration and other items. 

I can't recall another instance when the same guy was on two different stations on the same day at the same hour in the same market. There must be a scientific name for it. I would have asked Riskin, but he seemed a little busy!