 What is Prantera referring to when he mentions a 'pressure cooker'?
A gun is an interesting weapon; it can be hired, of course, and naturally doesn't care who hires it. Something much the same can be said of the gunman, too.... The evening was dark, it was unlikely that the other even saw the circle of steel that was the mouth of the shotgun barrel, now resting on the car's window ledge. And at that moment, the universe caved inward upon Joseph Marie Prantera. A door slid open in the wall in a way that Joe had never seen a door operate before. The other spoke precisely and slowly, the way a highly educated man speaks a language which he reads and writes fluently but has little occasion to practice vocally. Reston-Farrell said compassionately, "Try this, it's excellent cognac." Reston-Farrell, the one Joe had already met, was tall and drawn of face and with a chainsmoker's nervousness. He wondered, all over again, if this was some kind of pressure cooker. Whatever the something else was, a slot opened in the middle of the table and a glass, so clear of texture as to be all but invisible, was elevated. Brett-James said gently, "Hardly for one hundred and seventy years, Mr. Prantera." Joe Prantera's mind suddenly reverted to those last memories and his eyes narrowed dangerously. Reston-Farrell said, "Mr. Prantera, we have brought you from your era to perform a task for us." "That is why we brought you here, Mr. Prantera.
 a mental asylum
 a courtroom  an interrogation room  a mental asylum  a set-up