It's a whole new concept in calculating mass. You see, on Jake's planet, they use a system based on content, rather than on the quantitative scale...
8 seconds sound clip from the The Cat from Outer Space (1978) movie soundboard.
You can hear this line at 01:15:55.908 in the Blu-ray version of the movie.
Quote context
[...]
- Jake, how'd you like to hang around for a few days and watch me parlay this into a fortune?
- Well, I guess I'd better reduce the gold.
- Reduce it? What are you talking about?
- You've got a whole lifetime to explain that. I've got less than an hour.
- All right, don't move! All hands in the air! In the air!
[...]