T-Rex: You know what the most common element in the universe is? Friggin' hydrogen!
T-Rex: But after that, it's totally helium!
T-Rex: And this is why helium balloons are so awesome. Not only are they FUN and FLOATY and COME IN A VARIETY OF COLOURS, but we never have to feel bad about them, because helium is the one resource we'll never run out of!
Dromiceiomimus: Uh, T-Rex, that's not exactly true!
T-Rex: Uh, Dromiceiomimus, I'd be really surprised if we somehow used up the second-most common element in the UNIVERSE.
Utahraptor: It may be common across the universe, T-Rex, but it's not common here on Earth!
T-Rex: What?
Utahraptor: Helium's so light that once it's in the atmosphere, it actually ends up escaping into space. We get new helium by mining it out of natural gas reserves, but those are decidedly finite!
T-Rex: Man!! Kids with helium balloons were the last thing I could enjoy WITHOUT thinking how finite everything is!
T-Rex: You know what's left now? Rocks! The only thing I'm sure we'll never run out of is friggin' ROCKS.
T-Rex: Woooo