There are reasons why we don't have time travel. Good reasons.

• Re-learned an important comedy rule while mixing this one: faster is better. Did a polish pass where I tightened up the pauses, shortening the whole thing by 3-5 seconds, and it improved everything.
• Yep, all the voices are me. I think Alec Guinness and Peter Sellers can rest easy--their uncanny abilities to play multiple characters remain unmatched.
• For probably the best time-travel paradoxes, may I direct you to the Robert Heinlein stories "-All You Zombies-" and "By His Bootstraps."