Everything in a pull-top can is not cat food. Despite their appearance, humans are intelligent creatures and can be trained. Reflected light might be a trick - but chase it anyway. Never EVER climb on the kitchen table to smell the roses, humans apparently don't enjoy cleaning up glass or replacing vases. Some humans keep fish, but in spite of conventional feline wisdom, they're not considered to be acceptable prey.
Humans are ravenous and jealous creatures when it comes to food.
When they are in a feeding rage, they will NOT believe you when you try to explain that you just wanted to say hello. Humans like it when you curl up around their heads at night and purr but will often object if you start making kitty biscuits in their hair. If your humans fail to share their fresh water, any faucet is a good place to lick.