Are you looking for something?
Are you the hospital director, or just another one of the inmates?
You seem to be under the misapprehension that this is some sort of an asylum for the insane. I assure you, nothing could be further from the truth, Mr. Lupin. [turns to Lupin, revealing himself. Lupin gapes, horrified]
Uh...
Yes, I am Mamo. I have obtained the Philosopher's Stone now.
You're the big scary bad guy?
Of course, I could have done it myself, but I simply wanted to test your mettle. Your reputation is well-deserved; you may indeed be the greatest thief ever.
Yeah, but it's not good for business when people rip me off!
What would you say if I told you that by way of compensation I was prepared to make an offer of eternal life?
I'd say that when it comes to living, more ain't necessarily more!
I see you personify the type of genius that's incapable of rational thought.
All I want is that Stone back! Now, just...! [charges at Mamo and almost falls off the platform]
[steps on the invisible glass and continues charging at Mamo]
I was giving you more credit than you deserve! [falls screaming through an invisible hole and makes a hard landing on his rear end] Oh, me and my big mouth...! [gets up as Mamo cackles at him] Hey, Mamo! You think that's so funny? Well, you'll be laughing on the other side of your mouth, you hear me?

