Yes, the joke is the police are asking for anything they can blow out of proportion and they will take it from there. Ha Ha.
Looks like they are going to tamper with his statement.
Never talk to the cops. Always get a lawyer. He will find this out if he gives them anything, as they will likely use it to try to pin the crime on him.
Yup. The only things you should say to cops are ‘Am I under arrest?’ and ‘Am I free to leave?’
Mike — it’s not even “blow out of proportion.” It’s “lie about.”
Chak — depending on context, there are cases where you can say, “Hey, do you know where the bathroom is?” But that’s only if you weren’t the one to initiate the interaction.
ianosmond, why would somebody else initiate a discussion about you needing the bathroom?
On second thought, maybe I’d rather not know.
I always thought of tampering with evidence as altering a physical object and not a statement.
Chak: there are actually three phrases — the first is “Am I under arrest?” Depending on the answer to that one, you say either “Am I free to go?” (and if answered in the negative start with the first one again), or, if the answer to the first one is “yes”, then “I want a lawyer,” and shut up.
@larK, right you are.
How does that three-phrase trichotomy fit with a traffic stop?
Comics I Don't Understand 
Yes, the joke is the police are asking for anything they can blow out of proportion and they will take it from there. Ha Ha.
Looks like they are going to tamper with his statement.
Never talk to the cops. Always get a lawyer. He will find this out if he gives them anything, as they will likely use it to try to pin the crime on him.
Yup. The only things you should say to cops are ‘Am I under arrest?’ and ‘Am I free to leave?’
Mike — it’s not even “blow out of proportion.” It’s “lie about.”
Chak — depending on context, there are cases where you can say, “Hey, do you know where the bathroom is?” But that’s only if you weren’t the one to initiate the interaction.
ianosmond, why would somebody else initiate a discussion about you needing the bathroom?
On second thought, maybe I’d rather not know.
I always thought of tampering with evidence as altering a physical object and not a statement.
Chak: there are actually three phrases — the first is “Am I under arrest?” Depending on the answer to that one, you say either “Am I free to go?” (and if answered in the negative start with the first one again), or, if the answer to the first one is “yes”, then “I want a lawyer,” and shut up.
@larK, right you are.
How does that three-phrase trichotomy fit with a traffic stop?