Puck (Mark Salling) is also hurt by the lie, as he knows he is the real father, and he, too, wants to take responsibility for his child, but Quinn will not allow it. Puck has little character development at this point in the series, so it may be a surprise that he makes the right decision here. Even more surprising, he asks a depressed Finn what's wrong, even though he's been giving Finn crap for four weeks over joining glee club. Thus begins Puck's duality. Sometimes he makes dumb decisions, like sleeping with his best friend's girlfriend, which can be explained, though not excused, by hormones. Then, other times, he is there for the people that need him as a genuine friend.
It is likely Puck joins the New Directions simply to be close to Quinn, and brings two friends along with him so he looks slightly cooler. Puck does love singing, and is good, but this isn't obvious yet at this point in the series, despite his brief foray in the Acafellas.
The football game itself is a bit ridiculous. While the other team is certainly surprised and weirded out by the impromptu dance number, would they really stand there for so long, not even trying to get the ball, or get ready for the play? Perhaps the rules of football state they can't grab the ball until after the hike, but isn't there come kind of play clock? Didn't McKinley's little performance go longer than allowed? It's a really fun scene, and a great example of the cheesy humor Glee is known for, but it goes on long enough to think about how unrealistic it is.
"Preggers" features the first "Sue's Corner," Sue's (Jane Lynch) local news segment where she spouts her views. In this first piece, she supports caning, and then later mentions she spoke out in favor of littering. Even for Sue, this is a bit much. Setting aside that the character might hold those views, as it is almost believable for the character, why would the news station allow her to talk like this? Later "Sue's Corner"s will get better, but the first one is weak sauce.