Q: What are the risks associated with disrupting the space-time continuum?
A: Ah, the usual. Timey McTimeface syndrome, Chronal Displacement Syndrome, the Butterfly Effect of Unfortunate Consequences... just to name a few. Don't say we didn't warn you.
Q: What happens if I go back in time and kill my own grandfather?
A: Well, that's just a classic. You'll either prevent your own birth, which is a real downer. Or, you'll create a paradox, which means you'll either be erased from existence or stuck in a never-ending loop of "I'm not my grandfather, but he's definitely not me." Either way, it's a real brain-twister.