A: You're experiencing a temporal singularity. Don't worry, it's just a side effect of eating too much Cheez Whiz while time-traveling. Try taking a 10,000-year journey to the nearest temporal detox center.
A: Ha! You think you're so clever, don't you? The Y2K bug was just a minor temporal glitch. But seriously, it's fixed. Now, if you'll excuse me, I have to go deal with this pesky temporal loop...
A: Sorry, buddy. You can't get a refund, but I can offer you a free ticket to the Galactic Cantina Cantina Cantina Cantina Cantina Cantina, where the lines are shorter, but the lines themselves are infinite.