Amy has returned! It shouldn’t come as much of a surprise that she was just avoiding Mike after he and Ryan were running around asking all sorts of awkward questions. You can assume that Michelle told her what was up and she simply chose not to be found. Or you can invent some grand adventure to fill the time between now and New Years. I’ll leave that up to you.
I just want to make it clear that, while she is something of a troublemaker and can be moody and self interested, she is not evil. It is only that Mike seems to think she is. And it’s hard to blame him, after she hit him on the head with a pipe, even if there were mitigating circumstances.
On another note, check out the little Back to the Future reference. I know everything that happened in that movie was supposed to be accidental, but I imagine that somewhere behind all of those insane coincidences in those (incredible) movies, there was have been some sort of drug or alcohol use. How else do you reach 88 miles per hour in a mall parking lot? Even being chased by “Libyan Terrorists” seems fishy. What if Marty imagined the whole thing?