 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. 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. 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." Reston-Farrell said, "Mr. Prantera, we have brought you from your era to perform a task for us."
 a mental asylum
 a courtroom  an interrogation room  a mental asylum  a set-up