Last week, Tim Romano brought you up to speed on the salmon cannon over at the FlyTalk blog. This modern marvel literally blasts live salmon through a tube over dams, helping the fish get on their way to the spawning grounds. Well, John Oliver, host of “Last Week Tonight,” seems to have been really inspired by this salmon shooting technology. I gotta admit, this is pretty funny stuff. If you’re showing me Rachel Ray getting hit in the head with a fish, I’m laughing.