In the 5th episode of the 1998 series Freaks and Geeks, named Tests and Breasts, Lindsay Weir helps Daniel Desario to cheat on his Math test.
Eventually, the Math teacher suspects that they have cheated and they are called into the teacher's office for interrogation. There, Daniel becomes emotional and explains everyone in the room, how he was labelled as a dumb student when he was 11 and him never recovering from it as the reason he doesn't do well in academics. Once Daniel finishes speaking, Lindsay bursts out laughing and goes on like a maniac. Others in the room look puzzled about this and with that scene, the episode ends without any explanation. She is always shown as a person who can contain herself in situations like these, so this seems a little out of her character. What is funny about Daniel explaining himself?
My question is, what was the reason for her sudden outburst?