Q: What happens if I get lost in the timestream?
A: Don't. Just don't.
Q: Can I travel to ancient Egypt during the reign of the Pharaohs?
A: No. We have a no-ancient-Egypt policy. Too many mummy jokes.
Q: What if I encounter a paradox?
A: Paradoxes are just like taxes. You'll never understand them, but you'll pay for them anyway.