Nick normally limps, but he doesn't have any trouble moving to play tennis.
No wild stallion with a herd of females would travel miles for a female in heat.
Mowing the lawn at night when it is wet with dew dulls the blade and makes the entire job impossible.
The "private chat room" is just a (modern) text-file and behaves as such, and not like chat room.
When Claire is entering her nickname to chat, she actually is entering a term to search in the opened index - the search button is even still next to it.
Not believable that Jody would run away from home just because she saw her mom in bed with a man clothed.