In US Season 4: When the final six cooks are left, three are invited back to try and win an apron. One of them is Bime, and since no one liked him, no one is clapping when he returns... except Luca.
James: Stop clapping.
Luca: I like Bime!
One challenge in season 4 began with the chefs having to catch a live bird in the pantry, which had been assigned to each of them by the previous challenge's winner. Luca was assigned a turkey. Turkeys are not found in his home country of Italy.
Luca: What is that, a peacock?
A bunch in the first episode of Masterchef Junior alone...
Gordon trying out Dara's headband and being a Shipper on Deck for two of the kids.
This conversation when Sarah's working on her dish.
Gordon: Who makes the best chefs, girls or guys?
Sarah: Even in the olden days they were cooking and men were just sitting there watching TV. No offense to you.
Gordon: No offense to me? Oh, am I from the olden days?
Sarah: Yes, Chef.
The third episode of Masterchef Junior has three of the children (the top 3 performers of the previous challenge) face off on a whipped cream challenge. The results would be tested by having the kids hold the bowls upside down over the heads of the three judges. Needless to say, some messy fun ensued, including Gordon accidentally swearing after being covered in cream and quickly trying to save face by saying he meant "sugar", and Alexander - the only one of the three whose whipped cream stayed in the bowl - planting the upturned bowl of cream onto Graham's head anyhow.
During the challenge, Sarah screams at Gavin things like "Whip it! Whip like a man!" and "I don't want to see that arm stop moving!", like one seriously hardcore coach.
Dara: "It was really funny, cause Sarah, next to me, she was like, "come on, come on"! And I was, like, this is a different side of Sarah."
Masterchef Junior episode 4: The image of Graham and Joe skipping into the pantry behind the much smaller Sarah.
In Season 3 of the US version, blind chef Christine is often left utterly confused at her fellow contestants' reactions whenever the contents of a mystery box are revealed.
Monti: "Shut your mouth... [Paula Deen is revealed to be underneath the giant mystery box] SHUT YOUR MOUTH!!"