These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: Doris gets one when she brutally murders Carl in order to steal the memory machine back. This foreshadows what happens to the future as a result of her and Bowler Hat Guy changing it very well. Fortunately both of these events get an in-universe Ret Gone.
No Yay: People pair Wilbur and Lewis. The weird time traveling incest doesn't put them off.
Rewatch Bonus: At the science fair, Wilbur knocks over a box full of frogs and their owner makes him pick them all up. He isn't too pleased, calls her "annoying little girl", and she warns him: "I know karate". It's hilarious on later viewings when you realize the little girl is Franny in the past, Wilbur was calling his Mom an annoying little girl, and yes, she really does know karate.