I did that with my buddy when we were in H.S. at the Duluth show. We were 1/2 in the bag when we got there, and I bought some waxies from some vendor for ice fishing and stuck them in my pocket.
We got the bright idea to try them in the trout tank. I Put the waxie on the hook, caught a trout in about 15sec. Then they put it in a little plastic grocrey bag, and it was still jumping like crazy in that little sack, so I "whacked" it against the concrete pillar a few times near the tank, and there was an audible ghasp from the crowd.
