At the end of the episode where fry buys a 50 million dollar can of sardines at an auction, He puts the sardines on the pizza to share with the crew. You can see as he puts another sardine on the last slice that there are plenty more left in the can. After everybody coughs them up (exept Fry), Dr. Zoidberg comes in and greedely gobbles down the pizza. He then demands more sardines, and fry explains that that was the last sardine ever. However, if you are able to remember what happened just 10 seconds before, there are at least a dozen left! (And dont say "Well, he was probably saying that because he didnt want the rest eaten" Dont you think Dr. Zoidberd could smell them if he could smell just a few of them as soon as he walked in the door?)