Yup, the Tribe does this too - although, Tiger seems to be the most appaulled by cat urrp. He immediately tries to bury it and that's how we find the hidden spots - he's in there behind the futon or somewhere, scritching the carpet, hiding evidence.
William & Percy seem to do the most and it has to do with eating fast and then playing "race around the house 'til ya puke" game.
I used to freak cuz I thought someone was truly sick, but its just a kid thing with our tribe. They don't eat it though, just call in the waste removal guy-Tiger- and he does his best to clean up.
I have noticed that if I have a fresh container of cat grass growing for noshing, there are less episodes of this. Not scientific data, just a casual observation.