Captain: I know three really big numbers, if you really want to amaze someone.
Me: Really? What are they?
Captain: First, there is one hundred. The next biggest number is one billion. After that comes infinity.
Gal Smiley: I know one more! AND BEYOND!
TurtleHead 
Gotta chime in here.
In fact, there are many different “infinities”. Most significantly, the cardinality (size) of the set of real numbers is bigger (in a completely quantifiable way) than the set of natural numbers. And given any “infinity”, there’s another one that’s bigger.
So if the Captain asks what “AND BEYOND” is, you can tell him it’s called “aleph one” 🙂