I resisted the urge to facepalm. "You two have snarled up this timeline so thoroughly that I can't get out of it. So here's the deal. I will help you fix and maintain that car of yours. You will undo as many of your screw-ups as are necessary to let me open an interdimensional gate." I fixed the two of them -- white-haired scientist and teenager both -- with the sternest glare I could. "Or, gods help me, I will spend the next eighty or so years of my practically-immortal lifespan making the rest of your lives as close to a living hell as I possibly can."
-- Bob
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Then the horns kicked in...
...and my shoes began to squeak.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.