True story.
I was jump seating (safety pilot). Obnoxious old fool with traditional Southern American Machismo running through his veins (the trainer) in the left and a new cadet in the right seat. We're starting descent when cadet accidentally trips the autopilot (I still think it was the trainer - known for this sort of thing). Cadet re-engages and announces "AUTOPILOT 2". Trainer berates him "WHERE AUTOPILOT TWO???, IT SAYS AYY PEE TWO!". Cadet, with a lump in his throat, repeats.
Ten seconds later, the Thrust Idle FMA is displayed, cadet calls out ""TEE HAYCH ARR, AYE DEE EL EE". The look on the trainers face after that.