This is one of the great Squidward episodes, and has the infamous deleted scene with the "alarm system" which is just a bucket of gas on the door.
Squidward: (hands a customer his tray of food) Here you go, sir. A King Size Ultra Krabby Supreme with the works, double batter fried on a stick. (puts a stick into the food)
Customer: Thanks! (walks off)
Squidward: Barnacle head. (customer comes back)
Customer: Pardon me?
Squidward: (holds up a mayonnaise bottle) You forgot your mayonnaise. (sets it on the customer's tray)
Customer: Thanks. (walks off and sits at his table)
Squidward: Look at them eating that garbage. (customer bites into his food and squirts mayonnaise into his mouth) It's disgusting. They're sickening. I hate Krabby Patties.
SpongeBob: (laughing from the kitchen window) Good one, Squidward.
Squidward: Good what?
SpongeBob: Like you don't know. (hits Squidward on the back of the head) Saying, (imitates Squidward) "I hate Krabby Patties." (normal voice) That's hilarious! Everyone loves Krabby Patties.
Squidward: Yeah, well, not me.
SpongeBob: (silence) You're good at that. (jumps on top of the window) Hey everyone! Squid says he doesn't like Krabby Patties. Ha! (everyone laughs)
Squidward: Don't encourage them! They'll never leave!
And of course SpongeBob's expression, and Squidward's thighs after he's eaten all the patties haha