FAQ

Bender likely has a reputation for being a liar and a troublemaker around the school.

Bender's joke begins ""A naked blonde walks into a bar with a poodle under one arm and a two-foot salami under the other. She lays the poodle on the table. Bartender says,'I suppose you won't be needing a drink.' Naked lady says..." He then falls through the ceiling and due to his shock, forgets about telling the joke yelling "Oh shit!" The next lines uttered by him are "Forgot my pencil" by means of an explanation to his confused classmates as to how he got back into the library. The joke was ad-libbed by Judd Nelson and as thus, does not have an actual punchline. Various explanations have been suggested such as "You're not kidding, I thought I was buying a daschund", "How'd you know I was a Mormon?", "You think I want to remember a day like this?" or "No but the poodle could do with one".

There is probably a plethora of reasons from both of their parts. Mainly though, Bender pulled a fire alarm- a very illegal act and one that very likely caused a total evacuation of the school and disrupted classes for a good part of the day.

Bender: Bender is a born troublemaker. He's defiant, rude, disregards authority, is unmotivated. This could stem from the fact that he comes from a broken home and a dysfunctional family. His father is abusive and his mother echoes his dad's low opinion of their son. As a result, he lashes out.

Mr Vernon: he is quite plainly disgusted by unmotivated and trouble-making students like Bender. Mr. Vernon has probably experienced something akin to burnout in regards to his job: he's likely been doing it for many years and is bored or sick of having to hand out detentions, suspensions, etc, to students. Having student after student being sent to his office for punishment has taken a toll on him and his psyche. (Plus, he's at work for 8 hours on a Saturday having to monitor the teens in detention -- probably a condition of his contract with the school.)

There's a hint of his burnout when he talks to Carl the janitor: Vernon says that he thinks that student attitudes have changed over the years he's been at the school and that he's scared that the kids he deals with will one day be running the country. Carl counters by saying that it is actually Vernon's attitude that has changed and the kids are still pretty much the same - there will always be kids getting in trouble and severe kids like Bender. That idea is open for interpretation but Carl is right; Vernon doesn't like his job much anymore and may just be hanging out until retirement.