Here's an interesting scenario: Let's say there is, in fact, an "end" to the universe. We have the technology to make a space ship to reach that far (haha). Once reaching the end, would the space ship just, uh, stop? What could possibly be beyond the universe? Can one even answer these questions? Sheesh, mind boggling indeed.
"Keep sailing in one direction and you'll fall off the edge of the world."
"Err... but actually once I go past Japan I'll be heading back to the United States..."
"Bah, what is this nonsense? You're going East not West, you fool."
/Analogy