DS2 was nearly asleep by the time we'd driven to hospital (3.15 appointment) and was anxious by the time we'd gone the wrong way a couple of times.
We went into the sound-proof room with the professionals (whoever they were - no idea). I got him to start playing a game with prof. 1 (as I shall call her) stacking blocks on a stick to make a clown. Once he'd got going, they made a loud noise from the speaker on his left. Scared, he ran for the door. Sat him down again, they made another loud noise from the other side accompanied by a dancing turtle lit up within the speaker. Really scared of the turtle, he ran for the door again.
Got him back in the seat. He curled up in my lap and basically pretended to go to sleep (a sort of "if I can't see them, they won't see me" strategy). He had me fooled as I really thought he was asleep. But he perked right up again once we were out of the scary room!
Prof 1 suggested that for next time I talk him through the game they would be playing. Prof 1 is mistaken if she thinks that is something I can explain to DS1.
Can't help feeling that I'd have behaved like DS2 too! ah well.....