There is one other possibility I can think of:

• Assume Randall meant cretin and pronounced it the British way.
• Assume Mike thinks Randall is referring to Cretans.

Mike is correcting Randall for mispronouncing the nationality, due to Mike not knowing the word cretin and Mike misunderstood the insult.

This joke is irony: Mike is uneducated and doesn't know the word cretin, thus proving he is foolish (like a cretin).

If my interpretation is correct, this joke matches the tenor of this later joke in the same scene:

Randall: "Say hello to the scream extractor"
Mike: "Hello"

Although, I must say that RuffDove's answer also matches the tenor of the later joke if we assume that the statements are more intentional by Mike.

The snobs vs slobs interpretation means: Mike trying to break Randall's intimidation/threat by telling him to act less elite.

The "Hello" response could be doing the same thing. Mike is putting down Randall by not being intimidated by the machine and instead making light of a situation by responding to a rhetorical command.

There is one other possibility I can think of:

• Assume Randall meant cretin and pronounced it the British way.
• Assume Mike thinks Randall is referring to Cretans.

Mike is correcting Randall for mispronouncing the nationality, due to Mike not knowing the word cretin and Mike misunderstood the insult.

This joke is irony: Mike is uneducated and doesn't know the word cretin, thus proving he is foolish (like a cretin).

If my interpretation is correct, this joke matches the tenor of this later joke in the same scene:

Randall: "Say hello to the scream extractor"
Mike: "Hello"

Although, I must say that RuffDove's answer also matches the tenor of the later joke if we assume that the statements are more intentional by Mike.

The snobs vs slobs interpretation means: Mike trying to break Randall's intimidation/threat by telling him to act less elite.

The "Hello" response could be doing the same thing. Mike is putting down Randall by not being intimidated by the machine and instead making light of a situation by responding to a rhetorical command.

There is one other possibility I can think of:

• Assume Randall meant cretin and pronounced it the British way.
• Assume Mike thinks Randall is referring to Cretans.

Mike is correcting Randall for mispronouncing the nationality, due to Mike not knowing the word cretin and Mike misunderstood the insult.

This joke is irony: Mike is uneducated and doesn't know the word cretin, thus proving he is foolish (like a cretin).

If my interpretation is correct, this joke matches the tenor of this later joke in the same scene:

Randall: "Say hello to the scream extractor"
Mike: "Hello"

There is one other possibility I can think of:

• Assume Randall meant cretin and pronounced it the British way.
• Assume Mike thinks Randall is referring to Cretans.

Mike is correcting Randall for mispronouncing the nationality, due to Mike not knowing the word cretin and Mike misunderstood the insult.

This joke is irony: Mike is uneducated and doesn't know the word cretin, thus proving he is foolish (like a cretin).

If my interpretation is correct, this joke matches the tenor of this later joke in the same scene:

Randall: "Say hello to the scream extractor"
Mike: "Hello"

Although, I must say that RuffDove's answer also matches the tenor of the later joke if we assume that the statements are more intentional by Mike.

The snobs vs slobs interpretation means: Mike trying to break Randall's intimidation/threat by telling him to act less elite.

The "Hello" response could be doing the same thing. Mike is putting down Randall by not being intimidated by the machine and instead making light of a situation by responding to a rhetorical command.