So, taxiing out in IAD today, hear a gateway plane ask to turn off into the 30 pad to "slosh" some gas into the other side. They aren't legal to t/o because they are out of balance. Okay, whatever. I thought by "sloshing" I figured he was using slang for crossfeeding or whatever they do in a CRJ. That's where we come taxiing by and got one of the best sights I've seen in awhile. There's this CRJ doing doughnuts in the 30 pad (okay, tight circles) I guess "sloshing" gas to the other tank???? WTFO? I'm not familiar with CRJ systems, but that was one of the most ghetto redneck moves I've seen in awhile. I'm sure the pax were dizzy after their tilt-a-whirl ride! Funniest thing I've seen in awhile. Enjoyed it even more knowing it was GoJet. Please tell me how the CRJ balances it's tanks because if spinning around in the 30 pad is SOP, Canadair should be shot.