Not surprising that "I like this"! I think almost anyone would, accidental or not! Thanks for showing Dalboy.
BTW, I'm not clear (sorry) on exactly what "pouring medium" is, sorry, but as I THINK that inks of just about any sort have water in them, and assuming that "pouring medium" is some sort of "chemical plastic" (like acrylic) in liquid form, my complete guess is that what's happened is that the poring medium has "crazed" when it first contacted the water in the ink - the sort of effect you can get when cellulose (accidentally) contacts water or oil paint.
As said, complete guess, but very nice result anyway