I think that throwing it at the wall was a bad idea, but just letting it float might not be so bad. They've done frogs and ant collonies and the like. Interesting stuff.
I'm not one of those dont test anything on animals kind of people, but tell me why do you feel the need to do that to a cat? Obvously its going to to be scared, and flip out. I could have told you that before you scared the crap out of the cat and threw it against the wall
Too bad they didnt literally scare the crap out of the cat, that would be amusing..