One really annoying thing about the probes Matthew gets is the huge pack that hangs around his neck, where everything he does pretty much has to be recorded. There are buttons that have to be pressed when he starts eating, stops eating, lays down, stands up, coughs, chokes, complains of stomach pain, throws up, etc. He's gotten so used to it that he prompts me to do it. "I'm done eating. You need to press the not eating button." "I want to get up. Can you press the stand up key?"
Just a few minutes ago, I told him it was time to go to the potty. We got in there and in all seriousness, he asked me if I needed to push a poop button on his pack. :)