I didn't understand the cutscene of Series A on GTA Online, can someone explain me?

[NeuroAtypical]

After we finished the final heist of Series A, the cutscene of Trevor and buyer appear, the buyer tell to Trevor "the money is there and give me the cocaine first", so Trevor tell him to repeat again what he said, then he ask him: "Are you selling me the cocaine, Mr.Philips?"

Why does Trevor got scared when he told him to give the cocaine, isn't the cocaine the drug that Trevor was selling to him?

Sorry for bad english.

[Masuo15]

He got worried, because it was suspicious the buyer was saying "cocain" as if they were being recorded for evidence against Trevor that he does in fact sell cocain instead of a bague "drugs". At least thats what I think considering Trevor reacts like "normal" when the other guy said "you got the drugs?"

[kirkman]

anytime somebody says your full name followed by are you (insert illegal action here) they are probably recording you. just a word to the wise

[Masuo15]

Originally posted by kirkman:

anytime somebody says your full name followed by are you (insert illegal action here) they are probably recording you. just a word to the wise

Remember the buyer said cocaine 3 times BEFORE said Trevor's last name. When the buyer said "Trevor", nothing went wrong there...but Trevor's sense "tingle" when the buyer said cocaine.