A police officer is hammering furiously on a guy’s door. When the guy opens the door the officer says; “Do you know what GBH is?”
The guy say; “eh, no I don’t.”

The officers says; “Do you know what GTA is?”

The guy is just as clueless and says no.

The officers pushes on unperturbed; “Well, do you know what AS is then?”

The guy shakes his head and says; “ No officer, I don’t know what AS is. Why are you asking me all these questions? Am I under arrest?”

Whereupon the officer replies; “No. these are just initial inquiries.”