The goldfish quiz

Ok you wanted a Sunday afternoon quiz, so here is one.

Friendly wags on Facebook have been creating new “Should Miri Mogilevsky…” pages – be given a goldfish, be given a cheesecake, be given a goldfish, a cheesecake, and a tardis. So on the goldfish one, I commented

Yes but make sure she remembers where the car is before the fish goes into the plastic bag.

What is the reference?