Gauntlet 7 - One Do-Over?

At long last! Another Gauntlet! I’m throwing it right at your faces, O students of the Regis School of the Sacred Heart. Dare you pick it up and answer the challenge? If so, read on. The challenge is to expand on this introduction:

I entered the time machine, knowing it would only work once, but I had to go back to fix this one mistake.

Expand this sentence into about 250 words explaining the one mistake and why it has to be fixed. Save your submission as a Word document with the file name Gauntlet 7 [Insert Your Name Here]. For example, my file would be Gauntlet 7 Mr. Chance. Email all submissions to mchance at theregisschool.org.

Submissions are due to me by Thursday, 7 April. After that, I’ll review, format, and start posting them under the Challenge Answered category.

Huzzah!