for the NEXT episode, I'm predicting a scene like this: 
Saul's Guy: Tell you what, Mr. White, from now on your name is Walter Thompson, at Nashua, New Hampshire. Let's just practice a bit, hmmmm? So when I say, "Hello Mr. Thompson", you say "hi". 
Walt: Check! 
Saul's Guy: Hello, Mr. Thompson. 
[Walt stares blankly] 
Saul's Guy: [Pause] ...Now, remember, your name is Walt Thompson. 
Walt: I gotcha! 
Saul's Guy: Hello, Mr. Thompson. 
[again Walt stares blankly] 
[Saul's Guy stares at Walt] 
[hours pass by] 
Saul's Guy: [frustrated] Argh... Now when I say "Hello Mr. Thompson" and press down on your foot, you smile and nod. 
Walt: No problem. 
[stepping hard on Walt's foot] 
Saul's Guy: Hello, Mr. Thompson. 
[Walt stares blankly again for a few seconds] 
Walt: [whispering to the Lawson, the gun dealer] I think he's talking to you.